./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:43:37,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:43:37,759 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:43:37,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:43:37,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:43:37,791 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:43:37,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:43:37,792 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:43:37,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:43:37,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:43:37,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:43:37,797 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:43:37,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:43:37,799 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:43:37,800 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:43:37,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:43:37,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:43:37,800 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:43:37,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:43:37,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:43:37,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:43:37,801 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:43:37,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:43:37,801 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:43:37,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:43:37,802 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:43:37,802 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:43:37,802 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:43:37,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:43:37,803 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:43:37,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:43:37,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:43:37,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:43:37,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:43:37,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:43:37,804 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:43:37,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:43:37,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:43:37,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:43:37,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:43:37,805 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:43:37,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:43:37,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:43:37,806 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:43:37,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:43:37,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:43:37,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:43:37,999 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:43:37,999 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:43:38,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:43:38,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:43:39,115 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:43:39,116 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:43:39,141 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1fec13a/3c24391f60164d6ea592b84a366ef551/FLAGa66e86f8e [2024-06-21 15:43:39,152 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1fec13a/3c24391f60164d6ea592b84a366ef551 [2024-06-21 15:43:39,154 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:43:39,154 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:43:39,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 15:43:39,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:43:39,260 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:43:39,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:43:39,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:43:39,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:43:39,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:43:39" (1/2) ... [2024-06-21 15:43:39,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17563865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:39, skipping insertion in model container [2024-06-21 15:43:39,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:43:39" (1/2) ... [2024-06-21 15:43:39,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@593b0f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:43:39, skipping insertion in model container [2024-06-21 15:43:39,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:43:39" (2/2) ... [2024-06-21 15:43:39,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17563865 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39, skipping insertion in model container [2024-06-21 15:43:39,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:43:39" (2/2) ... [2024-06-21 15:43:39,268 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:43:39,308 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:43:39,310 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 15:43:39,310 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 15:43:39,310 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 15:43:39,310 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:43:39,310 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 15:43:39,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:43:39,616 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:43:39,640 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:43:39,695 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:43:39,718 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:43:39,718 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39 WrapperNode [2024-06-21 15:43:39,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:43:39,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:43:39,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:43:39,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:43:39,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,757 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-21 15:43:39,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:43:39,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:43:39,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:43:39,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:43:39,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,770 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,779 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:43:39,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,790 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:43:39,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:43:39,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:43:39,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:43:39,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (1/1) ... [2024-06-21 15:43:39,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:43:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:43:39,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:43:39,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:43:39,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:43:39,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:43:39,846 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:43:39,846 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:43:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:43:39,847 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:43:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:43:39,847 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:43:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:43:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:43:39,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:43:39,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:43:39,849 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:43:39,966 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:43:39,968 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:43:40,155 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:43:40,156 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:43:40,229 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:43:40,229 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:43:40,230 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:43:40 BoogieIcfgContainer [2024-06-21 15:43:40,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:43:40,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:43:40,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:43:40,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:43:40,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:43:39" (1/4) ... [2024-06-21 15:43:40,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a32ebf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:43:40, skipping insertion in model container [2024-06-21 15:43:40,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:43:39" (2/4) ... [2024-06-21 15:43:40,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a32ebf9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:43:40, skipping insertion in model container [2024-06-21 15:43:40,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:43:39" (3/4) ... [2024-06-21 15:43:40,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a32ebf9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:43:40, skipping insertion in model container [2024-06-21 15:43:40,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:43:40" (4/4) ... [2024-06-21 15:43:40,238 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:43:40,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:43:40,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:43:40,252 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:43:40,289 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:43:40,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 15:43:40,340 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 15:43:40,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:43:40,343 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 61 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. [2024-06-21 15:43:40,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 15:43:40,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 15:43:40,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:43:40,361 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;@bd67eba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:43:40,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:43:40,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:43:40,366 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:43:40,366 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:43:40,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:40,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:43:40,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 219098506, now seen corresponding path program 1 times [2024-06-21 15:43:40,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:40,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427624545] [2024-06-21 15:43:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:40,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427624545] [2024-06-21 15:43:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427624545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:40,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:40,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:43:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884745670] [2024-06-21 15:43:40,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:40,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:43:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:40,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:43:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:43:40,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-21 15:43:40,785 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) [2024-06-21 15:43:40,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:40,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-21 15:43:40,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:40,928 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-21 15:43:40,928 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 15:43:40,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3881 event pairs, 288 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-21 15:43:40,942 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 15:43:40,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-21 15:43:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:43:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:43:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-21 15:43:40,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-21 15:43:40,952 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-21 15:43:40,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-21 15:43:40,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:40,956 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 15:43:40,957 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} [2024-06-21 15:43:40,964 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 15:43:40,965 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 15:43:40,965 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) [2024-06-21 15:43:40,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:40,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:43:40,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:40,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1165332823, now seen corresponding path program 1 times [2024-06-21 15:43:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:40,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314989534] [2024-06-21 15:43:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:40,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:41,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:41,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314989534] [2024-06-21 15:43:41,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314989534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:41,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:41,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356005882] [2024-06-21 15:43:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:41,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:41,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:41,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:41,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:41,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:41,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:41,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:41,383 INFO L124 PetriNetUnfolderBase]: 754/1256 cut-off events. [2024-06-21 15:43:41,384 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-21 15:43:41,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1256 events. 754/1256 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6202 event pairs, 318 based on Foata normal form. 6/1258 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-21 15:43:41,391 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 15:43:41,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 250 flow [2024-06-21 15:43:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-21 15:43:41,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-21 15:43:41,393 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 107 transitions. [2024-06-21 15:43:41,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 250 flow [2024-06-21 15:43:41,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:41,394 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 15:43:41,395 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 15:43:41,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 15:43:41,395 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 15:43:41,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:41,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:41,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:43:41,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:41,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1101657832, now seen corresponding path program 1 times [2024-06-21 15:43:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:41,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136314929] [2024-06-21 15:43:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136314929] [2024-06-21 15:43:41,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136314929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:41,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:41,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221595136] [2024-06-21 15:43:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:41,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:41,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:41,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:41,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:41,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:41,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:41,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:41,747 INFO L124 PetriNetUnfolderBase]: 745/1241 cut-off events. [2024-06-21 15:43:41,748 INFO L125 PetriNetUnfolderBase]: For 594/630 co-relation queries the response was YES. [2024-06-21 15:43:41,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1241 events. 745/1241 cut-off events. For 594/630 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6088 event pairs, 218 based on Foata normal form. 19/1256 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-21 15:43:41,754 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-21 15:43:41,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 310 flow [2024-06-21 15:43:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-21 15:43:41,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-21 15:43:41,757 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 128 transitions. [2024-06-21 15:43:41,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 310 flow [2024-06-21 15:43:41,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:41,759 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-21 15:43:41,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-21 15:43:41,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-21 15:43:41,760 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-21 15:43:41,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:41,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:41,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:43:41,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:41,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2113468487, now seen corresponding path program 1 times [2024-06-21 15:43:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:41,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741744763] [2024-06-21 15:43:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:41,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741744763] [2024-06-21 15:43:41,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741744763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:41,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:41,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87138557] [2024-06-21 15:43:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:41,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:41,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:41,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:41,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:41,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:42,043 INFO L124 PetriNetUnfolderBase]: 697/1162 cut-off events. [2024-06-21 15:43:42,043 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-21 15:43:42,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1162 events. 697/1162 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5827 event pairs, 308 based on Foata normal form. 2/1162 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-21 15:43:42,049 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 15:43:42,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 350 flow [2024-06-21 15:43:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 15:43:42,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 15:43:42,051 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 102 transitions. [2024-06-21 15:43:42,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 350 flow [2024-06-21 15:43:42,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 325 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:42,057 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 229 flow [2024-06-21 15:43:42,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-21 15:43:42,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-21 15:43:42,059 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 229 flow [2024-06-21 15:43:42,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:42,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:43:42,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:42,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 298840478, now seen corresponding path program 1 times [2024-06-21 15:43:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:42,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001759621] [2024-06-21 15:43:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001759621] [2024-06-21 15:43:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001759621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777981935] [2024-06-21 15:43:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:42,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:42,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:42,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:42,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:42,364 INFO L124 PetriNetUnfolderBase]: 826/1387 cut-off events. [2024-06-21 15:43:42,364 INFO L125 PetriNetUnfolderBase]: For 1901/1945 co-relation queries the response was YES. [2024-06-21 15:43:42,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 1387 events. 826/1387 cut-off events. For 1901/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7004 event pairs, 293 based on Foata normal form. 16/1383 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-21 15:43:42,373 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-21 15:43:42,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 459 flow [2024-06-21 15:43:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 15:43:42,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-21 15:43:42,375 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 229 flow. Second operand 5 states and 131 transitions. [2024-06-21 15:43:42,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 459 flow [2024-06-21 15:43:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 457 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:42,380 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 309 flow [2024-06-21 15:43:42,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-21 15:43:42,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-21 15:43:42,382 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 309 flow [2024-06-21 15:43:42,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:42,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:43:42,387 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:42,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2136706782, now seen corresponding path program 2 times [2024-06-21 15:43:42,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:42,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026140064] [2024-06-21 15:43:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:42,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:42,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:42,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026140064] [2024-06-21 15:43:42,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026140064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:42,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:42,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:42,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73419061] [2024-06-21 15:43:42,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:42,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:42,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:42,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:42,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:42,693 INFO L124 PetriNetUnfolderBase]: 821/1380 cut-off events. [2024-06-21 15:43:42,693 INFO L125 PetriNetUnfolderBase]: For 3008/3070 co-relation queries the response was YES. [2024-06-21 15:43:42,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4570 conditions, 1380 events. 821/1380 cut-off events. For 3008/3070 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6947 event pairs, 293 based on Foata normal form. 18/1379 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-21 15:43:42,701 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-21 15:43:42,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 465 flow [2024-06-21 15:43:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-21 15:43:42,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-21 15:43:42,702 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 309 flow. Second operand 4 states and 107 transitions. [2024-06-21 15:43:42,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 465 flow [2024-06-21 15:43:42,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 440 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:42,707 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 328 flow [2024-06-21 15:43:42,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 15:43:42,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 15:43:42,708 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 328 flow [2024-06-21 15:43:42,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:42,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:42,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:43:42,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:42,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1466029098, now seen corresponding path program 1 times [2024-06-21 15:43:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:42,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110483700] [2024-06-21 15:43:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:42,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110483700] [2024-06-21 15:43:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110483700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:42,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475961477] [2024-06-21 15:43:42,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:42,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:42,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:42,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:42,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:42,946 INFO L124 PetriNetUnfolderBase]: 697/1172 cut-off events. [2024-06-21 15:43:42,946 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-21 15:43:42,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1172 events. 697/1172 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5931 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4029. Up to 1029 conditions per place. [2024-06-21 15:43:42,954 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 55 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-21 15:43:42,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 513 flow [2024-06-21 15:43:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 15:43:42,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-21 15:43:42,955 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 328 flow. Second operand 5 states and 124 transitions. [2024-06-21 15:43:42,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 513 flow [2024-06-21 15:43:42,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 483 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:42,959 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 339 flow [2024-06-21 15:43:42,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 15:43:42,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-21 15:43:42,960 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 339 flow [2024-06-21 15:43:42,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:42,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:42,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:42,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:43:42,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:42,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash 674120920, now seen corresponding path program 1 times [2024-06-21 15:43:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537171665] [2024-06-21 15:43:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:43,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:43,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537171665] [2024-06-21 15:43:43,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537171665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:43,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:43,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:43,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829849753] [2024-06-21 15:43:43,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:43,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:43,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:43,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 339 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) [2024-06-21 15:43:43,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:43,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:43,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:43,239 INFO L124 PetriNetUnfolderBase]: 888/1471 cut-off events. [2024-06-21 15:43:43,239 INFO L125 PetriNetUnfolderBase]: For 4342/4346 co-relation queries the response was YES. [2024-06-21 15:43:43,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1471 events. 888/1471 cut-off events. For 4342/4346 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7289 event pairs, 323 based on Foata normal form. 6/1474 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-21 15:43:43,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-21 15:43:43,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 689 flow [2024-06-21 15:43:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:43:43,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:43:43,251 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 339 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:43:43,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 689 flow [2024-06-21 15:43:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 666 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:43,258 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 465 flow [2024-06-21 15:43:43,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 15:43:43,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 15:43:43,260 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 465 flow [2024-06-21 15:43:43,260 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) [2024-06-21 15:43:43,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:43,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:43,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:43:43,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:43,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1813407076, now seen corresponding path program 2 times [2024-06-21 15:43:43,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:43,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190667322] [2024-06-21 15:43:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:43,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190667322] [2024-06-21 15:43:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190667322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:43,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:43,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762943224] [2024-06-21 15:43:43,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:43,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:43,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:43,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 465 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) [2024-06-21 15:43:43,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:43,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:43,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:43,616 INFO L124 PetriNetUnfolderBase]: 899/1494 cut-off events. [2024-06-21 15:43:43,617 INFO L125 PetriNetUnfolderBase]: For 5627/5637 co-relation queries the response was YES. [2024-06-21 15:43:43,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5642 conditions, 1494 events. 899/1494 cut-off events. For 5627/5637 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7459 event pairs, 310 based on Foata normal form. 12/1505 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-21 15:43:43,626 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-21 15:43:43,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 809 flow [2024-06-21 15:43:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:43:43,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:43:43,629 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 465 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:43:43,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 809 flow [2024-06-21 15:43:43,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 773 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:43,636 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 523 flow [2024-06-21 15:43:43,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-21 15:43:43,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 15:43:43,637 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 523 flow [2024-06-21 15:43:43,637 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) [2024-06-21 15:43:43,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:43,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:43,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:43:43,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:43,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1813401496, now seen corresponding path program 3 times [2024-06-21 15:43:43,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:43,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332729668] [2024-06-21 15:43:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:43,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:43,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:43,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332729668] [2024-06-21 15:43:43,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332729668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:43,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:43,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:43,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220031614] [2024-06-21 15:43:43,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:43,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:43,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:43,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:43,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:43,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:43,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 523 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) [2024-06-21 15:43:43,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:43,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:43,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:43,952 INFO L124 PetriNetUnfolderBase]: 894/1485 cut-off events. [2024-06-21 15:43:43,952 INFO L125 PetriNetUnfolderBase]: For 6651/6657 co-relation queries the response was YES. [2024-06-21 15:43:43,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 1485 events. 894/1485 cut-off events. For 6651/6657 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7351 event pairs, 323 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-21 15:43:43,983 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 68 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-21 15:43:43,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 748 flow [2024-06-21 15:43:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 15:43:43,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 15:43:43,985 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 523 flow. Second operand 5 states and 127 transitions. [2024-06-21 15:43:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 748 flow [2024-06-21 15:43:43,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 694 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:43,992 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 513 flow [2024-06-21 15:43:43,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=513, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-21 15:43:43,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 15:43:43,993 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 513 flow [2024-06-21 15:43:43,993 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) [2024-06-21 15:43:43,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:43,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:43,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:43:43,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:43,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash -646658297, now seen corresponding path program 1 times [2024-06-21 15:43:43,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:43,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964879320] [2024-06-21 15:43:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:43,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:44,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964879320] [2024-06-21 15:43:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964879320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:43:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836585220] [2024-06-21 15:43:44,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:43:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:43:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:43:44,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:44,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 513 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:44,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:44,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:44,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:44,205 INFO L124 PetriNetUnfolderBase]: 832/1381 cut-off events. [2024-06-21 15:43:44,206 INFO L125 PetriNetUnfolderBase]: For 7436/7438 co-relation queries the response was YES. [2024-06-21 15:43:44,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1381 events. 832/1381 cut-off events. For 7436/7438 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6895 event pairs, 278 based on Foata normal form. 3/1370 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-21 15:43:44,214 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 69 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-06-21 15:43:44,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 739 flow [2024-06-21 15:43:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 15:43:44,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 15:43:44,216 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 513 flow. Second operand 4 states and 98 transitions. [2024-06-21 15:43:44,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 739 flow [2024-06-21 15:43:44,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 701 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:44,223 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 565 flow [2024-06-21 15:43:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=565, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-06-21 15:43:44,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-21 15:43:44,223 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 565 flow [2024-06-21 15:43:44,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:44,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:44,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:44,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:43:44,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:44,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1363176749, now seen corresponding path program 1 times [2024-06-21 15:43:44,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:44,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405330307] [2024-06-21 15:43:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:44,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:44,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405330307] [2024-06-21 15:43:44,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405330307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:44,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:44,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835556813] [2024-06-21 15:43:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:44,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:44,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:44,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:44,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:44,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:44,524 INFO L124 PetriNetUnfolderBase]: 854/1423 cut-off events. [2024-06-21 15:43:44,525 INFO L125 PetriNetUnfolderBase]: For 9361/9373 co-relation queries the response was YES. [2024-06-21 15:43:44,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 1423 events. 854/1423 cut-off events. For 9361/9373 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7210 event pairs, 180 based on Foata normal form. 14/1388 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-21 15:43:44,536 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-21 15:43:44,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 897 flow [2024-06-21 15:43:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 15:43:44,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-21 15:43:44,538 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 565 flow. Second operand 6 states and 154 transitions. [2024-06-21 15:43:44,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 897 flow [2024-06-21 15:43:44,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 893 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:43:44,547 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 672 flow [2024-06-21 15:43:44,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-21 15:43:44,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 15:43:44,548 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 672 flow [2024-06-21 15:43:44,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:44,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:44,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:44,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:43:44,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:44,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2089820353, now seen corresponding path program 2 times [2024-06-21 15:43:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:44,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262950190] [2024-06-21 15:43:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:44,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:44,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262950190] [2024-06-21 15:43:44,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262950190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:44,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:44,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:44,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187815164] [2024-06-21 15:43:44,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:44,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:44,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:44,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:44,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:44,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:44,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:44,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:44,859 INFO L124 PetriNetUnfolderBase]: 871/1450 cut-off events. [2024-06-21 15:43:44,860 INFO L125 PetriNetUnfolderBase]: For 11696/11715 co-relation queries the response was YES. [2024-06-21 15:43:44,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 1450 events. 871/1450 cut-off events. For 11696/11715 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7359 event pairs, 252 based on Foata normal form. 12/1409 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-21 15:43:44,868 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 64 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-21 15:43:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 940 flow [2024-06-21 15:43:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:43:44,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 15:43:44,870 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 672 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:43:44,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 940 flow [2024-06-21 15:43:44,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 888 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:44,881 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 714 flow [2024-06-21 15:43:44,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-21 15:43:44,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 15:43:44,882 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 714 flow [2024-06-21 15:43:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:44,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:44,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:43:44,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:44,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 380867293, now seen corresponding path program 3 times [2024-06-21 15:43:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:44,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619166497] [2024-06-21 15:43:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:44,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619166497] [2024-06-21 15:43:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619166497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:44,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:44,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:44,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591429449] [2024-06-21 15:43:44,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:45,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:45,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:45,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:45,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:45,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:45,212 INFO L124 PetriNetUnfolderBase]: 859/1434 cut-off events. [2024-06-21 15:43:45,212 INFO L125 PetriNetUnfolderBase]: For 12730/12749 co-relation queries the response was YES. [2024-06-21 15:43:45,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 1434 events. 859/1434 cut-off events. For 12730/12749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7272 event pairs, 175 based on Foata normal form. 19/1403 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-21 15:43:45,220 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2024-06-21 15:43:45,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 942 flow [2024-06-21 15:43:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 15:43:45,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 15:43:45,221 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 714 flow. Second operand 5 states and 130 transitions. [2024-06-21 15:43:45,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 942 flow [2024-06-21 15:43:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 868 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:45,235 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 706 flow [2024-06-21 15:43:45,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=706, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-21 15:43:45,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-21 15:43:45,236 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 706 flow [2024-06-21 15:43:45,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:45,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:45,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:45,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:43:45,236 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:45,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash -361794759, now seen corresponding path program 1 times [2024-06-21 15:43:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:45,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162672643] [2024-06-21 15:43:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:45,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:45,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162672643] [2024-06-21 15:43:45,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162672643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:45,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:45,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:45,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559051491] [2024-06-21 15:43:45,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:45,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:45,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:45,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:45,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:45,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:45,628 INFO L124 PetriNetUnfolderBase]: 1027/1704 cut-off events. [2024-06-21 15:43:45,628 INFO L125 PetriNetUnfolderBase]: For 14624/14630 co-relation queries the response was YES. [2024-06-21 15:43:45,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7467 conditions, 1704 events. 1027/1704 cut-off events. For 14624/14630 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8780 event pairs, 220 based on Foata normal form. 18/1720 useless extension candidates. Maximal degree in co-relation 7427. Up to 1134 conditions per place. [2024-06-21 15:43:45,640 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 26 changer transitions 0/133 dead transitions. [2024-06-21 15:43:45,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1174 flow [2024-06-21 15:43:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:43:45,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 15:43:45,643 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 706 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:43:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1174 flow [2024-06-21 15:43:45,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1105 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:45,662 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 753 flow [2024-06-21 15:43:45,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-21 15:43:45,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 15:43:45,663 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 753 flow [2024-06-21 15:43:45,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:45,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:45,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:45,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:43:45,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:45,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash 504326899, now seen corresponding path program 2 times [2024-06-21 15:43:45,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:45,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385770765] [2024-06-21 15:43:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:45,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385770765] [2024-06-21 15:43:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385770765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:45,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888995617] [2024-06-21 15:43:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:45,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:45,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:45,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:45,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:45,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:45,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:46,055 INFO L124 PetriNetUnfolderBase]: 1085/1812 cut-off events. [2024-06-21 15:43:46,055 INFO L125 PetriNetUnfolderBase]: For 17010/17016 co-relation queries the response was YES. [2024-06-21 15:43:46,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8057 conditions, 1812 events. 1085/1812 cut-off events. For 17010/17016 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9593 event pairs, 325 based on Foata normal form. 22/1832 useless extension candidates. Maximal degree in co-relation 8014. Up to 1466 conditions per place. [2024-06-21 15:43:46,066 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2024-06-21 15:43:46,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 126 transitions, 1098 flow [2024-06-21 15:43:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:43:46,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 15:43:46,068 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 753 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:43:46,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 126 transitions, 1098 flow [2024-06-21 15:43:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 1068 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:46,089 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 789 flow [2024-06-21 15:43:46,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=789, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-06-21 15:43:46,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 15:43:46,090 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 789 flow [2024-06-21 15:43:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:46,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:46,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:46,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:43:46,091 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:46,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash -273228999, now seen corresponding path program 3 times [2024-06-21 15:43:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:46,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468851024] [2024-06-21 15:43:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:46,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468851024] [2024-06-21 15:43:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468851024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565553490] [2024-06-21 15:43:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:46,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:46,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:46,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:46,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:46,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:46,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:46,464 INFO L124 PetriNetUnfolderBase]: 1126/1883 cut-off events. [2024-06-21 15:43:46,465 INFO L125 PetriNetUnfolderBase]: For 18782/18788 co-relation queries the response was YES. [2024-06-21 15:43:46,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8549 conditions, 1883 events. 1126/1883 cut-off events. For 18782/18788 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10071 event pairs, 318 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8504. Up to 1450 conditions per place. [2024-06-21 15:43:46,493 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 99 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-21 15:43:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 132 transitions, 1174 flow [2024-06-21 15:43:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:43:46,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 15:43:46,495 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 789 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:43:46,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 132 transitions, 1174 flow [2024-06-21 15:43:46,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1127 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 15:43:46,511 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 837 flow [2024-06-21 15:43:46,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-06-21 15:43:46,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 15:43:46,512 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 837 flow [2024-06-21 15:43:46,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:46,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:46,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:46,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:43:46,513 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:46,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1077867241, now seen corresponding path program 4 times [2024-06-21 15:43:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:46,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649651616] [2024-06-21 15:43:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:46,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649651616] [2024-06-21 15:43:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649651616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:46,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:46,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:46,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489235857] [2024-06-21 15:43:46,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:46,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:46,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:46,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:46,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:46,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:46,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:46,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:46,921 INFO L124 PetriNetUnfolderBase]: 1184/1991 cut-off events. [2024-06-21 15:43:46,921 INFO L125 PetriNetUnfolderBase]: For 21864/21870 co-relation queries the response was YES. [2024-06-21 15:43:46,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 1991 events. 1184/1991 cut-off events. For 21864/21870 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10833 event pairs, 352 based on Foata normal form. 22/2011 useless extension candidates. Maximal degree in co-relation 9081. Up to 1653 conditions per place. [2024-06-21 15:43:46,934 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-21 15:43:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 1176 flow [2024-06-21 15:43:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:43:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:43:46,935 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 837 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:43:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 1176 flow [2024-06-21 15:43:46,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1144 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:46,958 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 865 flow [2024-06-21 15:43:46,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=865, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-21 15:43:46,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 15:43:46,959 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 865 flow [2024-06-21 15:43:46,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:46,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:46,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:46,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:43:46,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:46,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1078015111, now seen corresponding path program 5 times [2024-06-21 15:43:46,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:46,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130826074] [2024-06-21 15:43:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:46,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:47,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:47,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130826074] [2024-06-21 15:43:47,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130826074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:47,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:47,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:47,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940886823] [2024-06-21 15:43:47,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:47,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:47,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:47,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:47,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 865 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:47,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:47,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:47,401 INFO L124 PetriNetUnfolderBase]: 1225/2062 cut-off events. [2024-06-21 15:43:47,401 INFO L125 PetriNetUnfolderBase]: For 23756/23762 co-relation queries the response was YES. [2024-06-21 15:43:47,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9608 conditions, 2062 events. 1225/2062 cut-off events. For 23756/23762 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11370 event pairs, 267 based on Foata normal form. 18/2078 useless extension candidates. Maximal degree in co-relation 9559. Up to 1479 conditions per place. [2024-06-21 15:43:47,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-21 15:43:47,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1309 flow [2024-06-21 15:43:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:43:47,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 15:43:47,416 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 865 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:43:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1309 flow [2024-06-21 15:43:47,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1268 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:47,442 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 906 flow [2024-06-21 15:43:47,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-21 15:43:47,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 15:43:47,442 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 906 flow [2024-06-21 15:43:47,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:47,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:47,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:43:47,443 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:47,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504861, now seen corresponding path program 6 times [2024-06-21 15:43:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757544829] [2024-06-21 15:43:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:47,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757544829] [2024-06-21 15:43:47,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757544829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:47,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:47,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678578227] [2024-06-21 15:43:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:47,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:47,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:47,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:47,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:47,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:47,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:47,863 INFO L124 PetriNetUnfolderBase]: 1197/2019 cut-off events. [2024-06-21 15:43:47,863 INFO L125 PetriNetUnfolderBase]: For 24237/24245 co-relation queries the response was YES. [2024-06-21 15:43:47,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2019 events. 1197/2019 cut-off events. For 24237/24245 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11080 event pairs, 338 based on Foata normal form. 24/2042 useless extension candidates. Maximal degree in co-relation 9305. Up to 1680 conditions per place. [2024-06-21 15:43:47,876 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 21 changer transitions 0/137 dead transitions. [2024-06-21 15:43:47,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 137 transitions, 1292 flow [2024-06-21 15:43:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:43:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:43:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:43:47,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 15:43:47,878 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 906 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:43:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 137 transitions, 1292 flow [2024-06-21 15:43:47,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 1204 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:43:47,902 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 887 flow [2024-06-21 15:43:47,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-06-21 15:43:47,902 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-21 15:43:47,902 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 887 flow [2024-06-21 15:43:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:47,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:47,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:47,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:43:47,903 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:47,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1072289659, now seen corresponding path program 1 times [2024-06-21 15:43:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139402649] [2024-06-21 15:43:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:47,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:48,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139402649] [2024-06-21 15:43:48,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139402649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:48,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:48,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:48,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681076221] [2024-06-21 15:43:48,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:48,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:48,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:48,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:48,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:48,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:48,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:48,298 INFO L124 PetriNetUnfolderBase]: 1177/1987 cut-off events. [2024-06-21 15:43:48,298 INFO L125 PetriNetUnfolderBase]: For 22683/22691 co-relation queries the response was YES. [2024-06-21 15:43:48,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8887 conditions, 1987 events. 1177/1987 cut-off events. For 22683/22691 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10866 event pairs, 285 based on Foata normal form. 20/2006 useless extension candidates. Maximal degree in co-relation 8836. Up to 1441 conditions per place. [2024-06-21 15:43:48,310 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-06-21 15:43:48,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 140 transitions, 1237 flow [2024-06-21 15:43:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:43:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:43:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:43:48,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 15:43:48,311 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 887 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:43:48,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 140 transitions, 1237 flow [2024-06-21 15:43:48,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 140 transitions, 1196 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:43:48,335 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 860 flow [2024-06-21 15:43:48,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2024-06-21 15:43:48,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 15:43:48,336 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 860 flow [2024-06-21 15:43:48,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:48,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:48,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:48,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:43:48,336 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:48,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash 819392194, now seen corresponding path program 1 times [2024-06-21 15:43:48,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159069943] [2024-06-21 15:43:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:48,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:48,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159069943] [2024-06-21 15:43:48,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159069943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:48,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:48,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:48,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087819521] [2024-06-21 15:43:48,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:48,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:48,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:48,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:48,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:48,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:48,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:48,639 INFO L124 PetriNetUnfolderBase]: 1127/1917 cut-off events. [2024-06-21 15:43:48,639 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-21 15:43:48,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8743 conditions, 1917 events. 1127/1917 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10535 event pairs, 308 based on Foata normal form. 5/1906 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-21 15:43:48,652 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-21 15:43:48,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 1096 flow [2024-06-21 15:43:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-21 15:43:48,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 15:43:48,653 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 860 flow. Second operand 4 states and 99 transitions. [2024-06-21 15:43:48,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 1096 flow [2024-06-21 15:43:48,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 1026 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:43:48,678 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 868 flow [2024-06-21 15:43:48,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=868, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-06-21 15:43:48,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 15:43:48,679 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 868 flow [2024-06-21 15:43:48,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:48,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:48,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:48,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:43:48,680 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:48,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash -807621564, now seen corresponding path program 2 times [2024-06-21 15:43:48,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:48,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664199407] [2024-06-21 15:43:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:48,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:48,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:48,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664199407] [2024-06-21 15:43:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664199407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:48,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:48,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:48,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226560616] [2024-06-21 15:43:48,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:48,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:48,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:48,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 868 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:48,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:48,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:48,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:48,955 INFO L124 PetriNetUnfolderBase]: 1121/1909 cut-off events. [2024-06-21 15:43:48,955 INFO L125 PetriNetUnfolderBase]: For 23506/23509 co-relation queries the response was YES. [2024-06-21 15:43:48,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 1909 events. 1121/1909 cut-off events. For 23506/23509 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10518 event pairs, 308 based on Foata normal form. 5/1898 useless extension candidates. Maximal degree in co-relation 8642. Up to 1690 conditions per place. [2024-06-21 15:43:48,965 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 79 selfloop transitions, 22 changer transitions 0/114 dead transitions. [2024-06-21 15:43:48,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 114 transitions, 1120 flow [2024-06-21 15:43:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 15:43:48,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 15:43:48,967 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 868 flow. Second operand 5 states and 118 transitions. [2024-06-21 15:43:48,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 114 transitions, 1120 flow [2024-06-21 15:43:48,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 114 transitions, 1070 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:48,991 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 902 flow [2024-06-21 15:43:48,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=902, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-06-21 15:43:48,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-21 15:43:48,992 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 902 flow [2024-06-21 15:43:48,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:48,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:48,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:48,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:43:48,993 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:48,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:48,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1154175532, now seen corresponding path program 1 times [2024-06-21 15:43:48,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:48,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538983163] [2024-06-21 15:43:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:48,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:49,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538983163] [2024-06-21 15:43:49,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538983163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:49,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:49,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585663513] [2024-06-21 15:43:49,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:49,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:49,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:49,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:49,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 902 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:49,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:49,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:49,253 INFO L124 PetriNetUnfolderBase]: 1109/1923 cut-off events. [2024-06-21 15:43:49,253 INFO L125 PetriNetUnfolderBase]: For 23992/23994 co-relation queries the response was YES. [2024-06-21 15:43:49,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1923 events. 1109/1923 cut-off events. For 23992/23994 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10768 event pairs, 306 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 8778. Up to 1700 conditions per place. [2024-06-21 15:43:49,265 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 92 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-21 15:43:49,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 124 transitions, 1266 flow [2024-06-21 15:43:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 15:43:49,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-21 15:43:49,267 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 902 flow. Second operand 5 states and 122 transitions. [2024-06-21 15:43:49,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 124 transitions, 1266 flow [2024-06-21 15:43:49,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 124 transitions, 1208 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:49,316 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 960 flow [2024-06-21 15:43:49,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=960, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2024-06-21 15:43:49,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 15:43:49,317 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 960 flow [2024-06-21 15:43:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:49,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:49,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:43:49,318 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:49,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1025374060, now seen corresponding path program 2 times [2024-06-21 15:43:49,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:49,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045450916] [2024-06-21 15:43:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:49,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:49,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045450916] [2024-06-21 15:43:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045450916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:49,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:49,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866144825] [2024-06-21 15:43:49,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:49,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:49,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:49,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:49,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 960 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:49,647 INFO L124 PetriNetUnfolderBase]: 1104/1916 cut-off events. [2024-06-21 15:43:49,648 INFO L125 PetriNetUnfolderBase]: For 25924/25926 co-relation queries the response was YES. [2024-06-21 15:43:49,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9032 conditions, 1916 events. 1104/1916 cut-off events. For 25924/25926 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10727 event pairs, 306 based on Foata normal form. 4/1918 useless extension candidates. Maximal degree in co-relation 8978. Up to 1701 conditions per place. [2024-06-21 15:43:49,660 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2024-06-21 15:43:49,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 1212 flow [2024-06-21 15:43:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:43:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:43:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 15:43:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 15:43:49,661 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 960 flow. Second operand 4 states and 102 transitions. [2024-06-21 15:43:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 1212 flow [2024-06-21 15:43:49,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 1157 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 15:43:49,692 INFO L231 Difference]: Finished difference. Result has 113 places, 111 transitions, 955 flow [2024-06-21 15:43:49,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=955, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2024-06-21 15:43:49,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-21 15:43:49,693 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 955 flow [2024-06-21 15:43:49,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:49,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:43:49,693 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:49,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash -807606684, now seen corresponding path program 1 times [2024-06-21 15:43:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921747808] [2024-06-21 15:43:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921747808] [2024-06-21 15:43:49,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921747808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:49,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:49,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:43:49,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645217200] [2024-06-21 15:43:49,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:49,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:43:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:49,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:43:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:43:49,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:49,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 955 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:49,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:49,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:49,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:49,989 INFO L124 PetriNetUnfolderBase]: 1111/1911 cut-off events. [2024-06-21 15:43:49,989 INFO L125 PetriNetUnfolderBase]: For 27513/27518 co-relation queries the response was YES. [2024-06-21 15:43:49,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 1911 events. 1111/1911 cut-off events. For 27513/27518 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10598 event pairs, 292 based on Foata normal form. 7/1904 useless extension candidates. Maximal degree in co-relation 8934. Up to 1704 conditions per place. [2024-06-21 15:43:49,999 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 100 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-21 15:43:49,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 124 transitions, 1222 flow [2024-06-21 15:43:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-21 15:43:50,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-21 15:43:50,000 INFO L175 Difference]: Start difference. First operand has 113 places, 111 transitions, 955 flow. Second operand 5 states and 116 transitions. [2024-06-21 15:43:50,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 124 transitions, 1222 flow [2024-06-21 15:43:50,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 124 transitions, 1184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:50,029 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 964 flow [2024-06-21 15:43:50,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=964, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-06-21 15:43:50,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-21 15:43:50,030 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 964 flow [2024-06-21 15:43:50,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:50,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:50,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:50,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:43:50,031 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:50,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash 212333482, now seen corresponding path program 1 times [2024-06-21 15:43:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:50,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960129012] [2024-06-21 15:43:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:50,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960129012] [2024-06-21 15:43:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960129012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:50,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:50,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536258284] [2024-06-21 15:43:50,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:50,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:50,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 964 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:50,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:50,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:50,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:50,383 INFO L124 PetriNetUnfolderBase]: 1193/2031 cut-off events. [2024-06-21 15:43:50,383 INFO L125 PetriNetUnfolderBase]: For 28911/28917 co-relation queries the response was YES. [2024-06-21 15:43:50,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9645 conditions, 2031 events. 1193/2031 cut-off events. For 28911/28917 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11247 event pairs, 308 based on Foata normal form. 7/2037 useless extension candidates. Maximal degree in co-relation 9588. Up to 1807 conditions per place. [2024-06-21 15:43:50,395 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 116 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2024-06-21 15:43:50,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 149 transitions, 1473 flow [2024-06-21 15:43:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:43:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:43:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 15:43:50,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:43:50,396 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 964 flow. Second operand 8 states and 176 transitions. [2024-06-21 15:43:50,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 149 transitions, 1473 flow [2024-06-21 15:43:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 149 transitions, 1437 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:50,426 INFO L231 Difference]: Finished difference. Result has 122 places, 128 transitions, 1136 flow [2024-06-21 15:43:50,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=122, PETRI_TRANSITIONS=128} [2024-06-21 15:43:50,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 15:43:50,427 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 128 transitions, 1136 flow [2024-06-21 15:43:50,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:50,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:50,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:50,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:43:50,428 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:50,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -326650804, now seen corresponding path program 2 times [2024-06-21 15:43:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024434541] [2024-06-21 15:43:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:50,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:50,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:50,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024434541] [2024-06-21 15:43:50,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024434541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:50,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:50,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933801696] [2024-06-21 15:43:50,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:50,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:50,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:50,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:50,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:50,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 128 transitions, 1136 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:50,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:50,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:50,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:50,775 INFO L124 PetriNetUnfolderBase]: 1198/2040 cut-off events. [2024-06-21 15:43:50,776 INFO L125 PetriNetUnfolderBase]: For 31674/31682 co-relation queries the response was YES. [2024-06-21 15:43:50,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10018 conditions, 2040 events. 1198/2040 cut-off events. For 31674/31682 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11317 event pairs, 308 based on Foata normal form. 9/2048 useless extension candidates. Maximal degree in co-relation 9958. Up to 1813 conditions per place. [2024-06-21 15:43:50,789 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-21 15:43:50,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 151 transitions, 1556 flow [2024-06-21 15:43:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 15:43:50,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-21 15:43:50,790 INFO L175 Difference]: Start difference. First operand has 122 places, 128 transitions, 1136 flow. Second operand 7 states and 158 transitions. [2024-06-21 15:43:50,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 151 transitions, 1556 flow [2024-06-21 15:43:50,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 151 transitions, 1492 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:50,823 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1164 flow [2024-06-21 15:43:50,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-21 15:43:50,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 15:43:50,824 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1164 flow [2024-06-21 15:43:50,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:50,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:50,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:50,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:43:50,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:50,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:50,825 INFO L85 PathProgramCache]: Analyzing trace with hash -326639644, now seen corresponding path program 3 times [2024-06-21 15:43:50,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:50,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716164983] [2024-06-21 15:43:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:50,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716164983] [2024-06-21 15:43:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716164983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501758807] [2024-06-21 15:43:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:50,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:50,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:50,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1164 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:50,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:50,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:50,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:51,164 INFO L124 PetriNetUnfolderBase]: 1195/2033 cut-off events. [2024-06-21 15:43:51,164 INFO L125 PetriNetUnfolderBase]: For 33476/33480 co-relation queries the response was YES. [2024-06-21 15:43:51,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10017 conditions, 2033 events. 1195/2033 cut-off events. For 33476/33480 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11237 event pairs, 317 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 9956. Up to 1810 conditions per place. [2024-06-21 15:43:51,174 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 109 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-21 15:43:51,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 142 transitions, 1466 flow [2024-06-21 15:43:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-21 15:43:51,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-21 15:43:51,176 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1164 flow. Second operand 5 states and 116 transitions. [2024-06-21 15:43:51,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 142 transitions, 1466 flow [2024-06-21 15:43:51,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 142 transitions, 1400 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:43:51,215 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1156 flow [2024-06-21 15:43:51,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-21 15:43:51,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-21 15:43:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1156 flow [2024-06-21 15:43:51,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:51,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:51,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:43:51,216 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:51,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash 733536100, now seen corresponding path program 4 times [2024-06-21 15:43:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104758296] [2024-06-21 15:43:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104758296] [2024-06-21 15:43:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104758296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:51,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:51,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124956025] [2024-06-21 15:43:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:51,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:51,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1156 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:51,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:51,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:51,523 INFO L124 PetriNetUnfolderBase]: 1192/2016 cut-off events. [2024-06-21 15:43:51,523 INFO L125 PetriNetUnfolderBase]: For 32881/32885 co-relation queries the response was YES. [2024-06-21 15:43:51,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9940 conditions, 2016 events. 1192/2016 cut-off events. For 32881/32885 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11036 event pairs, 317 based on Foata normal form. 2/2016 useless extension candidates. Maximal degree in co-relation 9879. Up to 1800 conditions per place. [2024-06-21 15:43:51,536 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 111 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-21 15:43:51,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 149 transitions, 1512 flow [2024-06-21 15:43:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 15:43:51,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 15:43:51,540 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1156 flow. Second operand 6 states and 134 transitions. [2024-06-21 15:43:51,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 149 transitions, 1512 flow [2024-06-21 15:43:51,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 149 transitions, 1460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:51,580 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1224 flow [2024-06-21 15:43:51,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-21 15:43:51,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-21 15:43:51,581 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1224 flow [2024-06-21 15:43:51,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:51,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:51,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:51,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:43:51,581 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:51,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1419704304, now seen corresponding path program 1 times [2024-06-21 15:43:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:51,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921220791] [2024-06-21 15:43:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:51,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:51,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921220791] [2024-06-21 15:43:51,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921220791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:51,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:51,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061205535] [2024-06-21 15:43:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:51,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:51,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:51,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:51,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1224 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:51,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:51,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:51,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:51,930 INFO L124 PetriNetUnfolderBase]: 1197/2027 cut-off events. [2024-06-21 15:43:51,930 INFO L125 PetriNetUnfolderBase]: For 34929/34931 co-relation queries the response was YES. [2024-06-21 15:43:51,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 2027 events. 1197/2027 cut-off events. For 34929/34931 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11114 event pairs, 306 based on Foata normal form. 3/2029 useless extension candidates. Maximal degree in co-relation 10205. Up to 1823 conditions per place. [2024-06-21 15:43:51,943 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-21 15:43:51,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 1750 flow [2024-06-21 15:43:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 15:43:51,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 15:43:51,944 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1224 flow. Second operand 6 states and 138 transitions. [2024-06-21 15:43:51,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 1750 flow [2024-06-21 15:43:51,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1697 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:51,989 INFO L231 Difference]: Finished difference. Result has 135 places, 149 transitions, 1342 flow [2024-06-21 15:43:51,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1342, PETRI_PLACES=135, PETRI_TRANSITIONS=149} [2024-06-21 15:43:51,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-21 15:43:51,989 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 149 transitions, 1342 flow [2024-06-21 15:43:51,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:51,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:51,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:51,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:43:51,990 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:51,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1721831548, now seen corresponding path program 2 times [2024-06-21 15:43:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:51,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523252291] [2024-06-21 15:43:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:51,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:52,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523252291] [2024-06-21 15:43:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523252291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:52,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:52,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100542208] [2024-06-21 15:43:52,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:52,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:52,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:52,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 149 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:52,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:52,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:52,378 INFO L124 PetriNetUnfolderBase]: 1202/2036 cut-off events. [2024-06-21 15:43:52,378 INFO L125 PetriNetUnfolderBase]: For 37822/37826 co-relation queries the response was YES. [2024-06-21 15:43:52,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10696 conditions, 2036 events. 1202/2036 cut-off events. For 37822/37826 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11208 event pairs, 304 based on Foata normal form. 5/2040 useless extension candidates. Maximal degree in co-relation 10629. Up to 1835 conditions per place. [2024-06-21 15:43:52,391 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 143 selfloop transitions, 22 changer transitions 0/172 dead transitions. [2024-06-21 15:43:52,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1830 flow [2024-06-21 15:43:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-21 15:43:52,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-21 15:43:52,393 INFO L175 Difference]: Start difference. First operand has 135 places, 149 transitions, 1342 flow. Second operand 7 states and 155 transitions. [2024-06-21 15:43:52,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1830 flow [2024-06-21 15:43:52,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 172 transitions, 1778 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:52,436 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1396 flow [2024-06-21 15:43:52,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2024-06-21 15:43:52,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-21 15:43:52,437 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1396 flow [2024-06-21 15:43:52,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:52,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:52,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:43:52,438 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:52,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:52,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1721825968, now seen corresponding path program 3 times [2024-06-21 15:43:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:52,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594666445] [2024-06-21 15:43:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:52,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:52,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594666445] [2024-06-21 15:43:52,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594666445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:52,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:52,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395774563] [2024-06-21 15:43:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:52,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:52,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:52,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:52,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:52,804 INFO L124 PetriNetUnfolderBase]: 1199/2032 cut-off events. [2024-06-21 15:43:52,804 INFO L125 PetriNetUnfolderBase]: For 39693/39697 co-relation queries the response was YES. [2024-06-21 15:43:52,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10707 conditions, 2032 events. 1199/2032 cut-off events. For 39693/39697 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11172 event pairs, 306 based on Foata normal form. 5/2036 useless extension candidates. Maximal degree in co-relation 10638. Up to 1832 conditions per place. [2024-06-21 15:43:52,817 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-06-21 15:43:52,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1767 flow [2024-06-21 15:43:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 15:43:52,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 15:43:52,818 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1396 flow. Second operand 5 states and 119 transitions. [2024-06-21 15:43:52,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1767 flow [2024-06-21 15:43:52,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 169 transitions, 1695 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:52,868 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1370 flow [2024-06-21 15:43:52,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1370, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2024-06-21 15:43:52,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-21 15:43:52,869 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1370 flow [2024-06-21 15:43:52,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:52,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:52,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:52,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:43:52,869 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:52,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:52,870 INFO L85 PathProgramCache]: Analyzing trace with hash 865299045, now seen corresponding path program 1 times [2024-06-21 15:43:52,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:52,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429507297] [2024-06-21 15:43:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429507297] [2024-06-21 15:43:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429507297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:52,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:52,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:52,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86488797] [2024-06-21 15:43:52,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:52,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:53,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:53,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1370 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:53,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:53,278 INFO L124 PetriNetUnfolderBase]: 1165/1985 cut-off events. [2024-06-21 15:43:53,278 INFO L125 PetriNetUnfolderBase]: For 43624/43629 co-relation queries the response was YES. [2024-06-21 15:43:53,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10548 conditions, 1985 events. 1165/1985 cut-off events. For 43624/43629 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11019 event pairs, 302 based on Foata normal form. 9/1978 useless extension candidates. Maximal degree in co-relation 10478. Up to 1713 conditions per place. [2024-06-21 15:43:53,291 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2024-06-21 15:43:53,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 166 transitions, 1714 flow [2024-06-21 15:43:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 15:43:53,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 15:43:53,291 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1370 flow. Second operand 5 states and 119 transitions. [2024-06-21 15:43:53,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 166 transitions, 1714 flow [2024-06-21 15:43:53,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 166 transitions, 1674 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:53,350 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1426 flow [2024-06-21 15:43:53,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1426, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2024-06-21 15:43:53,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-21 15:43:53,351 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1426 flow [2024-06-21 15:43:53,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:53,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:53,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:43:53,352 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:53,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1264796355, now seen corresponding path program 2 times [2024-06-21 15:43:53,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:53,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600161373] [2024-06-21 15:43:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:53,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:53,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600161373] [2024-06-21 15:43:53,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600161373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:53,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:53,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503574731] [2024-06-21 15:43:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:53,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:53,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:53,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:53,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1426 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:53,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:53,692 INFO L124 PetriNetUnfolderBase]: 1177/2005 cut-off events. [2024-06-21 15:43:53,693 INFO L125 PetriNetUnfolderBase]: For 46673/46678 co-relation queries the response was YES. [2024-06-21 15:43:53,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10879 conditions, 2005 events. 1177/2005 cut-off events. For 46673/46678 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11120 event pairs, 306 based on Foata normal form. 9/1998 useless extension candidates. Maximal degree in co-relation 10808. Up to 1739 conditions per place. [2024-06-21 15:43:53,706 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-21 15:43:53,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 169 transitions, 1782 flow [2024-06-21 15:43:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 15:43:53,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-21 15:43:53,709 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1426 flow. Second operand 6 states and 137 transitions. [2024-06-21 15:43:53,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 169 transitions, 1782 flow [2024-06-21 15:43:53,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 169 transitions, 1714 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:53,774 INFO L231 Difference]: Finished difference. Result has 146 places, 158 transitions, 1460 flow [2024-06-21 15:43:53,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1460, PETRI_PLACES=146, PETRI_TRANSITIONS=158} [2024-06-21 15:43:53,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-21 15:43:53,775 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 158 transitions, 1460 flow [2024-06-21 15:43:53,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:53,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:43:53,775 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:53,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1279081155, now seen corresponding path program 3 times [2024-06-21 15:43:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51812632] [2024-06-21 15:43:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51812632] [2024-06-21 15:43:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51812632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:53,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159611829] [2024-06-21 15:43:53,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:53,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:53,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 158 transitions, 1460 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:53,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:53,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:53,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:54,127 INFO L124 PetriNetUnfolderBase]: 1167/1991 cut-off events. [2024-06-21 15:43:54,127 INFO L125 PetriNetUnfolderBase]: For 47210/47215 co-relation queries the response was YES. [2024-06-21 15:43:54,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10774 conditions, 1991 events. 1167/1991 cut-off events. For 47210/47215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11058 event pairs, 300 based on Foata normal form. 9/1984 useless extension candidates. Maximal degree in co-relation 10702. Up to 1687 conditions per place. [2024-06-21 15:43:54,142 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 34 changer transitions 0/172 dead transitions. [2024-06-21 15:43:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 172 transitions, 1828 flow [2024-06-21 15:43:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 15:43:54,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 15:43:54,143 INFO L175 Difference]: Start difference. First operand has 146 places, 158 transitions, 1460 flow. Second operand 6 states and 138 transitions. [2024-06-21 15:43:54,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 172 transitions, 1828 flow [2024-06-21 15:43:54,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 172 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:54,211 INFO L231 Difference]: Finished difference. Result has 148 places, 160 transitions, 1489 flow [2024-06-21 15:43:54,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1489, PETRI_PLACES=148, PETRI_TRANSITIONS=160} [2024-06-21 15:43:54,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 15:43:54,212 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 160 transitions, 1489 flow [2024-06-21 15:43:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:54,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:54,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:43:54,212 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:54,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -436841749, now seen corresponding path program 1 times [2024-06-21 15:43:54,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:54,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845277807] [2024-06-21 15:43:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:54,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:54,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845277807] [2024-06-21 15:43:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845277807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:54,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:54,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850403790] [2024-06-21 15:43:54,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:54,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:54,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:54,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 160 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:54,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:54,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:54,576 INFO L124 PetriNetUnfolderBase]: 1178/2011 cut-off events. [2024-06-21 15:43:54,576 INFO L125 PetriNetUnfolderBase]: For 50406/50410 co-relation queries the response was YES. [2024-06-21 15:43:54,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 2011 events. 1178/2011 cut-off events. For 50406/50410 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11216 event pairs, 261 based on Foata normal form. 8/2011 useless extension candidates. Maximal degree in co-relation 10952. Up to 1686 conditions per place. [2024-06-21 15:43:54,589 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 134 selfloop transitions, 32 changer transitions 0/183 dead transitions. [2024-06-21 15:43:54,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 183 transitions, 2003 flow [2024-06-21 15:43:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 15:43:54,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 15:43:54,591 INFO L175 Difference]: Start difference. First operand has 148 places, 160 transitions, 1489 flow. Second operand 6 states and 145 transitions. [2024-06-21 15:43:54,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 183 transitions, 2003 flow [2024-06-21 15:43:54,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 183 transitions, 1906 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:54,651 INFO L231 Difference]: Finished difference. Result has 150 places, 164 transitions, 1533 flow [2024-06-21 15:43:54,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1533, PETRI_PLACES=150, PETRI_TRANSITIONS=164} [2024-06-21 15:43:54,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-21 15:43:54,652 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 164 transitions, 1533 flow [2024-06-21 15:43:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:54,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:43:54,652 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -436781299, now seen corresponding path program 2 times [2024-06-21 15:43:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376859153] [2024-06-21 15:43:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376859153] [2024-06-21 15:43:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376859153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:54,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997246487] [2024-06-21 15:43:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:54,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:54,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:54,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 164 transitions, 1533 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:54,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:54,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:54,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:55,024 INFO L124 PetriNetUnfolderBase]: 1192/2033 cut-off events. [2024-06-21 15:43:55,025 INFO L125 PetriNetUnfolderBase]: For 53248/53252 co-relation queries the response was YES. [2024-06-21 15:43:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11229 conditions, 2033 events. 1192/2033 cut-off events. For 53248/53252 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11352 event pairs, 298 based on Foata normal form. 8/2033 useless extension candidates. Maximal degree in co-relation 11155. Up to 1768 conditions per place. [2024-06-21 15:43:55,040 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 133 selfloop transitions, 30 changer transitions 0/180 dead transitions. [2024-06-21 15:43:55,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 180 transitions, 1931 flow [2024-06-21 15:43:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:43:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:43:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 15:43:55,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 15:43:55,041 INFO L175 Difference]: Start difference. First operand has 150 places, 164 transitions, 1533 flow. Second operand 6 states and 140 transitions. [2024-06-21 15:43:55,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 180 transitions, 1931 flow [2024-06-21 15:43:55,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 180 transitions, 1855 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:55,114 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1565 flow [2024-06-21 15:43:55,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1565, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-21 15:43:55,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-21 15:43:55,114 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1565 flow [2024-06-21 15:43:55,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:55,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:55,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:43:55,115 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:55,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1836993707, now seen corresponding path program 3 times [2024-06-21 15:43:55,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:55,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738994257] [2024-06-21 15:43:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:55,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:55,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:55,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738994257] [2024-06-21 15:43:55,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738994257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:55,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:55,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:43:55,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922048780] [2024-06-21 15:43:55,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:55,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:43:55,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:43:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:43:55,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 15:43:55,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1565 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:55,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 15:43:55,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:55,498 INFO L124 PetriNetUnfolderBase]: 1182/2019 cut-off events. [2024-06-21 15:43:55,498 INFO L125 PetriNetUnfolderBase]: For 53369/53373 co-relation queries the response was YES. [2024-06-21 15:43:55,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11043 conditions, 2019 events. 1182/2019 cut-off events. For 53369/53373 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11294 event pairs, 259 based on Foata normal form. 8/2019 useless extension candidates. Maximal degree in co-relation 10967. Up to 1726 conditions per place. [2024-06-21 15:43:55,513 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 138 selfloop transitions, 27 changer transitions 0/182 dead transitions. [2024-06-21 15:43:55,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 182 transitions, 1935 flow [2024-06-21 15:43:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:43:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:43:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 15:43:55,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:43:55,514 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1565 flow. Second operand 5 states and 125 transitions. [2024-06-21 15:43:55,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 182 transitions, 1935 flow [2024-06-21 15:43:55,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 182 transitions, 1837 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:55,587 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1531 flow [2024-06-21 15:43:55,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1531, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-21 15:43:55,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-21 15:43:55,588 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1531 flow [2024-06-21 15:43:55,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:55,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:55,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:43:55,588 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:55,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash -154294055, now seen corresponding path program 1 times [2024-06-21 15:43:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:55,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460870502] [2024-06-21 15:43:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:55,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:55,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460870502] [2024-06-21 15:43:55,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460870502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:55,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:55,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:55,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345409579] [2024-06-21 15:43:55,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:55,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:55,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:55,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:55,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1531 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:55,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:55,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:55,962 INFO L124 PetriNetUnfolderBase]: 1256/2130 cut-off events. [2024-06-21 15:43:55,962 INFO L125 PetriNetUnfolderBase]: For 54741/54749 co-relation queries the response was YES. [2024-06-21 15:43:55,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11559 conditions, 2130 events. 1256/2130 cut-off events. For 54741/54749 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11851 event pairs, 335 based on Foata normal form. 9/2137 useless extension candidates. Maximal degree in co-relation 11482. Up to 1767 conditions per place. [2024-06-21 15:43:55,980 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 139 selfloop transitions, 54 changer transitions 0/200 dead transitions. [2024-06-21 15:43:55,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 200 transitions, 2241 flow [2024-06-21 15:43:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 15:43:55,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:43:55,981 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1531 flow. Second operand 7 states and 170 transitions. [2024-06-21 15:43:55,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 200 transitions, 2241 flow [2024-06-21 15:43:56,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 200 transitions, 2179 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:56,056 INFO L231 Difference]: Finished difference. Result has 158 places, 175 transitions, 1703 flow [2024-06-21 15:43:56,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1703, PETRI_PLACES=158, PETRI_TRANSITIONS=175} [2024-06-21 15:43:56,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 15:43:56,056 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 175 transitions, 1703 flow [2024-06-21 15:43:56,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:56,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:43:56,057 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:56,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1033448141, now seen corresponding path program 1 times [2024-06-21 15:43:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457734543] [2024-06-21 15:43:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:56,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457734543] [2024-06-21 15:43:56,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457734543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:56,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:56,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049297951] [2024-06-21 15:43:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:56,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:56,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:56,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 175 transitions, 1703 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:56,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:56,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:56,519 INFO L124 PetriNetUnfolderBase]: 1282/2171 cut-off events. [2024-06-21 15:43:56,519 INFO L125 PetriNetUnfolderBase]: For 60122/60134 co-relation queries the response was YES. [2024-06-21 15:43:56,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12250 conditions, 2171 events. 1282/2171 cut-off events. For 60122/60134 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12111 event pairs, 322 based on Foata normal form. 13/2183 useless extension candidates. Maximal degree in co-relation 12172. Up to 1843 conditions per place. [2024-06-21 15:43:56,533 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 63 changer transitions 0/212 dead transitions. [2024-06-21 15:43:56,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 212 transitions, 2492 flow [2024-06-21 15:43:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:43:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:43:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 15:43:56,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-21 15:43:56,535 INFO L175 Difference]: Start difference. First operand has 158 places, 175 transitions, 1703 flow. Second operand 10 states and 221 transitions. [2024-06-21 15:43:56,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 212 transitions, 2492 flow [2024-06-21 15:43:56,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2403 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 15:43:56,616 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1919 flow [2024-06-21 15:43:56,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1919, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-21 15:43:56,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 15:43:56,617 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1919 flow [2024-06-21 15:43:56,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:56,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:43:56,617 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:56,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:56,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1033447955, now seen corresponding path program 2 times [2024-06-21 15:43:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597644888] [2024-06-21 15:43:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:56,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597644888] [2024-06-21 15:43:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597644888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:56,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:56,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:56,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044554746] [2024-06-21 15:43:56,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:56,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:56,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:56,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:56,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:56,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:56,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1919 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:56,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:57,001 INFO L124 PetriNetUnfolderBase]: 1287/2180 cut-off events. [2024-06-21 15:43:57,001 INFO L125 PetriNetUnfolderBase]: For 63974/63986 co-relation queries the response was YES. [2024-06-21 15:43:57,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 2180 events. 1287/2180 cut-off events. For 63974/63986 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12199 event pairs, 322 based on Foata normal form. 13/2192 useless extension candidates. Maximal degree in co-relation 12550. Up to 1891 conditions per place. [2024-06-21 15:43:57,017 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 165 selfloop transitions, 38 changer transitions 0/210 dead transitions. [2024-06-21 15:43:57,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 210 transitions, 2403 flow [2024-06-21 15:43:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:43:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:43:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:43:57,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 15:43:57,018 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1919 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:43:57,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 210 transitions, 2403 flow [2024-06-21 15:43:57,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 210 transitions, 2276 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:57,104 INFO L231 Difference]: Finished difference. Result has 169 places, 190 transitions, 1908 flow [2024-06-21 15:43:57,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1908, PETRI_PLACES=169, PETRI_TRANSITIONS=190} [2024-06-21 15:43:57,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 15:43:57,105 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 190 transitions, 1908 flow [2024-06-21 15:43:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:57,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:57,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:43:57,107 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:57,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1210816811, now seen corresponding path program 2 times [2024-06-21 15:43:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:57,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713004124] [2024-06-21 15:43:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:57,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:57,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:57,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713004124] [2024-06-21 15:43:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713004124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:57,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:57,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054539634] [2024-06-21 15:43:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:57,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:57,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 190 transitions, 1908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:57,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:57,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:57,575 INFO L124 PetriNetUnfolderBase]: 1318/2229 cut-off events. [2024-06-21 15:43:57,575 INFO L125 PetriNetUnfolderBase]: For 68552/68564 co-relation queries the response was YES. [2024-06-21 15:43:57,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13090 conditions, 2229 events. 1318/2229 cut-off events. For 68552/68564 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12539 event pairs, 322 based on Foata normal form. 13/2241 useless extension candidates. Maximal degree in co-relation 13008. Up to 1882 conditions per place. [2024-06-21 15:43:57,595 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 75 changer transitions 0/226 dead transitions. [2024-06-21 15:43:57,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 226 transitions, 2743 flow [2024-06-21 15:43:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:43:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:43:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 15:43:57,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 15:43:57,596 INFO L175 Difference]: Start difference. First operand has 169 places, 190 transitions, 1908 flow. Second operand 9 states and 201 transitions. [2024-06-21 15:43:57,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 226 transitions, 2743 flow [2024-06-21 15:43:57,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 226 transitions, 2643 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:43:57,709 INFO L231 Difference]: Finished difference. Result has 173 places, 205 transitions, 2151 flow [2024-06-21 15:43:57,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=173, PETRI_TRANSITIONS=205} [2024-06-21 15:43:57,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 15:43:57,709 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 205 transitions, 2151 flow [2024-06-21 15:43:57,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:57,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:57,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:43:57,710 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:57,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:57,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1210579475, now seen corresponding path program 3 times [2024-06-21 15:43:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:57,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017273767] [2024-06-21 15:43:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:57,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:57,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017273767] [2024-06-21 15:43:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017273767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:57,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:57,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:57,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16847615] [2024-06-21 15:43:57,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:57,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 205 transitions, 2151 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:58,116 INFO L124 PetriNetUnfolderBase]: 1331/2251 cut-off events. [2024-06-21 15:43:58,116 INFO L125 PetriNetUnfolderBase]: For 72643/72655 co-relation queries the response was YES. [2024-06-21 15:43:58,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 2251 events. 1331/2251 cut-off events. For 72643/72655 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12663 event pairs, 322 based on Foata normal form. 13/2263 useless extension candidates. Maximal degree in co-relation 13300. Up to 1943 conditions per place. [2024-06-21 15:43:58,133 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 173 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-21 15:43:58,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 230 transitions, 2795 flow [2024-06-21 15:43:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:43:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:43:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 15:43:58,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 15:43:58,134 INFO L175 Difference]: Start difference. First operand has 173 places, 205 transitions, 2151 flow. Second operand 8 states and 178 transitions. [2024-06-21 15:43:58,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 230 transitions, 2795 flow [2024-06-21 15:43:58,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 230 transitions, 2682 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 15:43:58,244 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 2234 flow [2024-06-21 15:43:58,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2234, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-06-21 15:43:58,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 15:43:58,245 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 2234 flow [2024-06-21 15:43:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:58,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:58,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:43:58,245 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:58,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1126390637, now seen corresponding path program 3 times [2024-06-21 15:43:58,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:58,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503588690] [2024-06-21 15:43:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:58,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:58,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:58,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503588690] [2024-06-21 15:43:58,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503588690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:58,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:58,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447564675] [2024-06-21 15:43:58,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:58,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:58,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:58,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 2234 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:58,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:58,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:58,667 INFO L124 PetriNetUnfolderBase]: 1328/2247 cut-off events. [2024-06-21 15:43:58,668 INFO L125 PetriNetUnfolderBase]: For 75138/75150 co-relation queries the response was YES. [2024-06-21 15:43:58,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13387 conditions, 2247 events. 1328/2247 cut-off events. For 75138/75150 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12679 event pairs, 322 based on Foata normal form. 13/2259 useless extension candidates. Maximal degree in co-relation 13302. Up to 1897 conditions per place. [2024-06-21 15:43:58,687 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 76 changer transitions 0/234 dead transitions. [2024-06-21 15:43:58,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 234 transitions, 2910 flow [2024-06-21 15:43:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:43:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:43:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-21 15:43:58,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-21 15:43:58,691 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 2234 flow. Second operand 11 states and 237 transitions. [2024-06-21 15:43:58,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 234 transitions, 2910 flow [2024-06-21 15:43:58,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 234 transitions, 2790 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 15:43:58,813 INFO L231 Difference]: Finished difference. Result has 186 places, 211 transitions, 2272 flow [2024-06-21 15:43:58,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2272, PETRI_PLACES=186, PETRI_TRANSITIONS=211} [2024-06-21 15:43:58,813 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 15:43:58,814 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 211 transitions, 2272 flow [2024-06-21 15:43:58,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:58,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:58,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:43:58,814 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:58,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 944790125, now seen corresponding path program 1 times [2024-06-21 15:43:58,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:58,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37557094] [2024-06-21 15:43:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:58,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37557094] [2024-06-21 15:43:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37557094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:58,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637850005] [2024-06-21 15:43:58,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:58,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:58,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:58,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 211 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:58,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:58,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:58,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:59,293 INFO L124 PetriNetUnfolderBase]: 1402/2363 cut-off events. [2024-06-21 15:43:59,293 INFO L125 PetriNetUnfolderBase]: For 90450/90458 co-relation queries the response was YES. [2024-06-21 15:43:59,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14307 conditions, 2363 events. 1402/2363 cut-off events. For 90450/90458 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13421 event pairs, 244 based on Foata normal form. 14/2376 useless extension candidates. Maximal degree in co-relation 14221. Up to 1984 conditions per place. [2024-06-21 15:43:59,313 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-21 15:43:59,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3006 flow [2024-06-21 15:43:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:43:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:43:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 15:43:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-21 15:43:59,314 INFO L175 Difference]: Start difference. First operand has 186 places, 211 transitions, 2272 flow. Second operand 9 states and 202 transitions. [2024-06-21 15:43:59,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3006 flow [2024-06-21 15:43:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 249 transitions, 2830 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 15:43:59,468 INFO L231 Difference]: Finished difference. Result has 188 places, 216 transitions, 2236 flow [2024-06-21 15:43:59,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2236, PETRI_PLACES=188, PETRI_TRANSITIONS=216} [2024-06-21 15:43:59,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 15:43:59,468 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 216 transitions, 2236 flow [2024-06-21 15:43:59,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:43:59,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:43:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:43:59,469 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:43:59,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:43:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1210813835, now seen corresponding path program 2 times [2024-06-21 15:43:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:43:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735181214] [2024-06-21 15:43:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:43:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:43:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:43:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:43:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:43:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735181214] [2024-06-21 15:43:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735181214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:43:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:43:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:43:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197010255] [2024-06-21 15:43:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:43:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:43:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:43:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:43:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:43:59,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:43:59,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 216 transitions, 2236 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:43:59,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:43:59,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:43:59,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:43:59,922 INFO L124 PetriNetUnfolderBase]: 1430/2411 cut-off events. [2024-06-21 15:43:59,922 INFO L125 PetriNetUnfolderBase]: For 96531/96539 co-relation queries the response was YES. [2024-06-21 15:43:59,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14656 conditions, 2411 events. 1430/2411 cut-off events. For 96531/96539 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13757 event pairs, 325 based on Foata normal form. 16/2426 useless extension candidates. Maximal degree in co-relation 14567. Up to 2128 conditions per place. [2024-06-21 15:43:59,942 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 205 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-21 15:43:59,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 242 transitions, 2807 flow [2024-06-21 15:43:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:43:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:43:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 15:43:59,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 15:43:59,944 INFO L175 Difference]: Start difference. First operand has 188 places, 216 transitions, 2236 flow. Second operand 9 states and 195 transitions. [2024-06-21 15:43:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 242 transitions, 2807 flow [2024-06-21 15:44:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 242 transitions, 2762 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:00,105 INFO L231 Difference]: Finished difference. Result has 193 places, 217 transitions, 2269 flow [2024-06-21 15:44:00,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2269, PETRI_PLACES=193, PETRI_TRANSITIONS=217} [2024-06-21 15:44:00,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 15:44:00,106 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 217 transitions, 2269 flow [2024-06-21 15:44:00,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:00,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:00,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:00,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:44:00,106 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:00,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1210487405, now seen corresponding path program 3 times [2024-06-21 15:44:00,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481603112] [2024-06-21 15:44:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:00,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:00,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:00,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481603112] [2024-06-21 15:44:00,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481603112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:00,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:00,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:00,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440498059] [2024-06-21 15:44:00,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:00,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:00,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 217 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:00,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:00,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:00,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:00,564 INFO L124 PetriNetUnfolderBase]: 1458/2455 cut-off events. [2024-06-21 15:44:00,564 INFO L125 PetriNetUnfolderBase]: For 98782/98790 co-relation queries the response was YES. [2024-06-21 15:44:00,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15006 conditions, 2455 events. 1458/2455 cut-off events. For 98782/98790 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14047 event pairs, 323 based on Foata normal form. 14/2468 useless extension candidates. Maximal degree in co-relation 14915. Up to 2142 conditions per place. [2024-06-21 15:44:00,586 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 33 changer transitions 0/249 dead transitions. [2024-06-21 15:44:00,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2896 flow [2024-06-21 15:44:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-21 15:44:00,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 15:44:00,587 INFO L175 Difference]: Start difference. First operand has 193 places, 217 transitions, 2269 flow. Second operand 10 states and 215 transitions. [2024-06-21 15:44:00,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2896 flow [2024-06-21 15:44:00,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 249 transitions, 2837 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:00,772 INFO L231 Difference]: Finished difference. Result has 197 places, 220 transitions, 2325 flow [2024-06-21 15:44:00,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2325, PETRI_PLACES=197, PETRI_TRANSITIONS=220} [2024-06-21 15:44:00,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 15:44:00,772 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 220 transitions, 2325 flow [2024-06-21 15:44:00,772 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) [2024-06-21 15:44:00,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:00,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:44:00,773 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:00,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash 318037639, now seen corresponding path program 4 times [2024-06-21 15:44:00,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:00,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449284887] [2024-06-21 15:44:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:00,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:00,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:00,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449284887] [2024-06-21 15:44:00,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449284887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:00,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:00,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:00,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279607635] [2024-06-21 15:44:00,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:00,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:00,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:00,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 220 transitions, 2325 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:00,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:00,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:00,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:01,227 INFO L124 PetriNetUnfolderBase]: 1471/2479 cut-off events. [2024-06-21 15:44:01,227 INFO L125 PetriNetUnfolderBase]: For 99355/99367 co-relation queries the response was YES. [2024-06-21 15:44:01,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15345 conditions, 2479 events. 1471/2479 cut-off events. For 99355/99367 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14249 event pairs, 350 based on Foata normal form. 13/2491 useless extension candidates. Maximal degree in co-relation 15252. Up to 2111 conditions per place. [2024-06-21 15:44:01,248 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 59 changer transitions 0/255 dead transitions. [2024-06-21 15:44:01,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 255 transitions, 3161 flow [2024-06-21 15:44:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:44:01,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 15:44:01,249 INFO L175 Difference]: Start difference. First operand has 197 places, 220 transitions, 2325 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:44:01,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 255 transitions, 3161 flow [2024-06-21 15:44:01,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 255 transitions, 3095 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:01,430 INFO L231 Difference]: Finished difference. Result has 198 places, 226 transitions, 2467 flow [2024-06-21 15:44:01,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2467, PETRI_PLACES=198, PETRI_TRANSITIONS=226} [2024-06-21 15:44:01,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 15:44:01,431 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 226 transitions, 2467 flow [2024-06-21 15:44:01,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:01,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:01,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:01,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:44:01,431 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:01,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash -700013827, now seen corresponding path program 5 times [2024-06-21 15:44:01,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:01,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724277240] [2024-06-21 15:44:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:01,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:01,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724277240] [2024-06-21 15:44:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724277240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:01,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:01,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426806076] [2024-06-21 15:44:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:01,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:01,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 226 transitions, 2467 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:01,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:01,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:01,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:01,923 INFO L124 PetriNetUnfolderBase]: 1484/2499 cut-off events. [2024-06-21 15:44:01,923 INFO L125 PetriNetUnfolderBase]: For 104835/104847 co-relation queries the response was YES. [2024-06-21 15:44:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15659 conditions, 2499 events. 1484/2499 cut-off events. For 104835/104847 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14396 event pairs, 350 based on Foata normal form. 13/2511 useless extension candidates. Maximal degree in co-relation 15565. Up to 2126 conditions per place. [2024-06-21 15:44:01,943 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 184 selfloop transitions, 68 changer transitions 0/259 dead transitions. [2024-06-21 15:44:01,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 259 transitions, 3321 flow [2024-06-21 15:44:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 15:44:01,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-21 15:44:01,945 INFO L175 Difference]: Start difference. First operand has 198 places, 226 transitions, 2467 flow. Second operand 9 states and 206 transitions. [2024-06-21 15:44:01,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 259 transitions, 3321 flow [2024-06-21 15:44:02,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 3105 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:02,113 INFO L231 Difference]: Finished difference. Result has 202 places, 232 transitions, 2489 flow [2024-06-21 15:44:02,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2489, PETRI_PLACES=202, PETRI_TRANSITIONS=232} [2024-06-21 15:44:02,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 15:44:02,113 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 232 transitions, 2489 flow [2024-06-21 15:44:02,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:02,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:02,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:02,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:44:02,114 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:02,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:02,114 INFO L85 PathProgramCache]: Analyzing trace with hash -700013455, now seen corresponding path program 1 times [2024-06-21 15:44:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:02,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063335628] [2024-06-21 15:44:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:02,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063335628] [2024-06-21 15:44:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063335628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:02,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665743739] [2024-06-21 15:44:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:02,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 232 transitions, 2489 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:02,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:02,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:02,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:02,564 INFO L124 PetriNetUnfolderBase]: 1497/2519 cut-off events. [2024-06-21 15:44:02,564 INFO L125 PetriNetUnfolderBase]: For 109585/109597 co-relation queries the response was YES. [2024-06-21 15:44:02,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15853 conditions, 2519 events. 1497/2519 cut-off events. For 109585/109597 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14495 event pairs, 349 based on Foata normal form. 13/2531 useless extension candidates. Maximal degree in co-relation 15758. Up to 2186 conditions per place. [2024-06-21 15:44:02,586 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 194 selfloop transitions, 53 changer transitions 0/254 dead transitions. [2024-06-21 15:44:02,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 254 transitions, 3213 flow [2024-06-21 15:44:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 15:44:02,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-21 15:44:02,586 INFO L175 Difference]: Start difference. First operand has 202 places, 232 transitions, 2489 flow. Second operand 8 states and 179 transitions. [2024-06-21 15:44:02,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 254 transitions, 3213 flow [2024-06-21 15:44:02,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 254 transitions, 3083 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:02,739 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2577 flow [2024-06-21 15:44:02,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2577, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-21 15:44:02,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 15:44:02,740 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2577 flow [2024-06-21 15:44:02,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:02,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:02,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:02,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:44:02,740 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:02,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash -705674737, now seen corresponding path program 6 times [2024-06-21 15:44:02,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:02,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835413863] [2024-06-21 15:44:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835413863] [2024-06-21 15:44:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835413863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:02,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475350157] [2024-06-21 15:44:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:02,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:02,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2577 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:02,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:02,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:02,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:03,183 INFO L124 PetriNetUnfolderBase]: 1494/2514 cut-off events. [2024-06-21 15:44:03,184 INFO L125 PetriNetUnfolderBase]: For 113382/113390 co-relation queries the response was YES. [2024-06-21 15:44:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16020 conditions, 2514 events. 1494/2514 cut-off events. For 113382/113390 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14452 event pairs, 361 based on Foata normal form. 9/2521 useless extension candidates. Maximal degree in co-relation 15924. Up to 2141 conditions per place. [2024-06-21 15:44:03,205 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 61 changer transitions 0/259 dead transitions. [2024-06-21 15:44:03,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3329 flow [2024-06-21 15:44:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 15:44:03,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 15:44:03,206 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2577 flow. Second operand 6 states and 148 transitions. [2024-06-21 15:44:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3329 flow [2024-06-21 15:44:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3207 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:03,398 INFO L231 Difference]: Finished difference. Result has 206 places, 238 transitions, 2587 flow [2024-06-21 15:44:03,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2587, PETRI_PLACES=206, PETRI_TRANSITIONS=238} [2024-06-21 15:44:03,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 15:44:03,399 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 238 transitions, 2587 flow [2024-06-21 15:44:03,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:03,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:03,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:03,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:44:03,400 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:03,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -705554581, now seen corresponding path program 4 times [2024-06-21 15:44:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:03,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552715836] [2024-06-21 15:44:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:03,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:03,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552715836] [2024-06-21 15:44:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552715836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:03,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:03,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123119708] [2024-06-21 15:44:03,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:03,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:03,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:03,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 238 transitions, 2587 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:03,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:03,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:03,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:03,888 INFO L124 PetriNetUnfolderBase]: 1491/2511 cut-off events. [2024-06-21 15:44:03,889 INFO L125 PetriNetUnfolderBase]: For 112438/112450 co-relation queries the response was YES. [2024-06-21 15:44:03,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 2511 events. 1491/2511 cut-off events. For 112438/112450 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14454 event pairs, 349 based on Foata normal form. 13/2523 useless extension candidates. Maximal degree in co-relation 15928. Up to 2181 conditions per place. [2024-06-21 15:44:03,909 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-06-21 15:44:03,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3227 flow [2024-06-21 15:44:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 15:44:03,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 15:44:03,910 INFO L175 Difference]: Start difference. First operand has 206 places, 238 transitions, 2587 flow. Second operand 7 states and 164 transitions. [2024-06-21 15:44:03,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3227 flow [2024-06-21 15:44:04,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 256 transitions, 3075 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:04,078 INFO L231 Difference]: Finished difference. Result has 208 places, 238 transitions, 2553 flow [2024-06-21 15:44:04,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2553, PETRI_PLACES=208, PETRI_TRANSITIONS=238} [2024-06-21 15:44:04,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 15:44:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 238 transitions, 2553 flow [2024-06-21 15:44:04,079 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) [2024-06-21 15:44:04,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:04,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:04,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:44:04,079 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:04,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -705554767, now seen corresponding path program 7 times [2024-06-21 15:44:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:04,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080555375] [2024-06-21 15:44:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:04,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:04,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080555375] [2024-06-21 15:44:04,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080555375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:04,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521091945] [2024-06-21 15:44:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:04,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:04,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 238 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:04,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:04,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:04,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:04,557 INFO L124 PetriNetUnfolderBase]: 1488/2507 cut-off events. [2024-06-21 15:44:04,557 INFO L125 PetriNetUnfolderBase]: For 115189/115201 co-relation queries the response was YES. [2024-06-21 15:44:04,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15991 conditions, 2507 events. 1488/2507 cut-off events. For 115189/115201 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14428 event pairs, 349 based on Foata normal form. 13/2519 useless extension candidates. Maximal degree in co-relation 15893. Up to 2208 conditions per place. [2024-06-21 15:44:04,580 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-21 15:44:04,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 254 transitions, 3087 flow [2024-06-21 15:44:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 15:44:04,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:44:04,581 INFO L175 Difference]: Start difference. First operand has 208 places, 238 transitions, 2553 flow. Second operand 6 states and 141 transitions. [2024-06-21 15:44:04,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 254 transitions, 3087 flow [2024-06-21 15:44:04,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 254 transitions, 2984 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:04,770 INFO L231 Difference]: Finished difference. Result has 209 places, 238 transitions, 2524 flow [2024-06-21 15:44:04,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2524, PETRI_PLACES=209, PETRI_TRANSITIONS=238} [2024-06-21 15:44:04,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 15:44:04,771 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 238 transitions, 2524 flow [2024-06-21 15:44:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:04,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:04,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:04,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:44:04,771 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:04,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 620163953, now seen corresponding path program 8 times [2024-06-21 15:44:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:04,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500129387] [2024-06-21 15:44:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500129387] [2024-06-21 15:44:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500129387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:04,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948436293] [2024-06-21 15:44:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:04,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:04,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:04,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 238 transitions, 2524 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:04,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:04,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:04,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:05,292 INFO L124 PetriNetUnfolderBase]: 1485/2505 cut-off events. [2024-06-21 15:44:05,292 INFO L125 PetriNetUnfolderBase]: For 118170/118182 co-relation queries the response was YES. [2024-06-21 15:44:05,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15972 conditions, 2505 events. 1485/2505 cut-off events. For 118170/118182 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14449 event pairs, 349 based on Foata normal form. 13/2517 useless extension candidates. Maximal degree in co-relation 15873. Up to 2148 conditions per place. [2024-06-21 15:44:05,316 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 204 selfloop transitions, 54 changer transitions 0/265 dead transitions. [2024-06-21 15:44:05,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3210 flow [2024-06-21 15:44:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:44:05,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 15:44:05,317 INFO L175 Difference]: Start difference. First operand has 209 places, 238 transitions, 2524 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:44:05,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3210 flow [2024-06-21 15:44:05,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3122 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:05,538 INFO L231 Difference]: Finished difference. Result has 211 places, 238 transitions, 2558 flow [2024-06-21 15:44:05,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2558, PETRI_PLACES=211, PETRI_TRANSITIONS=238} [2024-06-21 15:44:05,538 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 15:44:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 238 transitions, 2558 flow [2024-06-21 15:44:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:05,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:05,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:44:05,539 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:05,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 620175485, now seen corresponding path program 2 times [2024-06-21 15:44:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:05,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220804354] [2024-06-21 15:44:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:05,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:05,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220804354] [2024-06-21 15:44:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220804354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:05,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281769447] [2024-06-21 15:44:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:05,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:05,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:05,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 238 transitions, 2558 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:05,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:05,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:05,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:06,054 INFO L124 PetriNetUnfolderBase]: 1514/2548 cut-off events. [2024-06-21 15:44:06,054 INFO L125 PetriNetUnfolderBase]: For 124275/124287 co-relation queries the response was YES. [2024-06-21 15:44:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 2548 events. 1514/2548 cut-off events. For 124275/124287 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 14668 event pairs, 349 based on Foata normal form. 13/2560 useless extension candidates. Maximal degree in co-relation 16407. Up to 2231 conditions per place. [2024-06-21 15:44:06,079 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 46 changer transitions 0/265 dead transitions. [2024-06-21 15:44:06,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3383 flow [2024-06-21 15:44:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:44:06,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:44:06,080 INFO L175 Difference]: Start difference. First operand has 211 places, 238 transitions, 2558 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:44:06,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3383 flow [2024-06-21 15:44:06,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3221 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:06,281 INFO L231 Difference]: Finished difference. Result has 210 places, 250 transitions, 2704 flow [2024-06-21 15:44:06,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2704, PETRI_PLACES=210, PETRI_TRANSITIONS=250} [2024-06-21 15:44:06,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-21 15:44:06,282 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 250 transitions, 2704 flow [2024-06-21 15:44:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:06,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:06,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:44:06,283 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 620164139, now seen corresponding path program 5 times [2024-06-21 15:44:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126957857] [2024-06-21 15:44:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126957857] [2024-06-21 15:44:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126957857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:06,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:06,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347167738] [2024-06-21 15:44:06,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:06,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:06,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:06,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:06,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 250 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:06,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:06,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:06,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:06,770 INFO L124 PetriNetUnfolderBase]: 1519/2557 cut-off events. [2024-06-21 15:44:06,771 INFO L125 PetriNetUnfolderBase]: For 119855/119869 co-relation queries the response was YES. [2024-06-21 15:44:06,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 2557 events. 1519/2557 cut-off events. For 119855/119869 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14739 event pairs, 349 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16350. Up to 2220 conditions per place. [2024-06-21 15:44:06,794 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-21 15:44:06,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 270 transitions, 3420 flow [2024-06-21 15:44:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 15:44:06,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 15:44:06,795 INFO L175 Difference]: Start difference. First operand has 210 places, 250 transitions, 2704 flow. Second operand 6 states and 145 transitions. [2024-06-21 15:44:06,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 270 transitions, 3420 flow [2024-06-21 15:44:06,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 270 transitions, 3359 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:07,002 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 2823 flow [2024-06-21 15:44:07,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2823, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-21 15:44:07,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 15:44:07,002 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 2823 flow [2024-06-21 15:44:07,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:07,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:07,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:07,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:44:07,003 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:07,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash 620169905, now seen corresponding path program 3 times [2024-06-21 15:44:07,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:07,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55827419] [2024-06-21 15:44:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:07,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:07,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:07,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55827419] [2024-06-21 15:44:07,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55827419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:07,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:07,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896196064] [2024-06-21 15:44:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:07,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:07,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:07,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:07,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:07,523 INFO L124 PetriNetUnfolderBase]: 1516/2553 cut-off events. [2024-06-21 15:44:07,523 INFO L125 PetriNetUnfolderBase]: For 118707/118721 co-relation queries the response was YES. [2024-06-21 15:44:07,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2553 events. 1516/2553 cut-off events. For 118707/118721 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14724 event pairs, 349 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16400. Up to 2235 conditions per place. [2024-06-21 15:44:07,546 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 46 changer transitions 0/266 dead transitions. [2024-06-21 15:44:07,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 266 transitions, 3373 flow [2024-06-21 15:44:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 15:44:07,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:44:07,547 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 2823 flow. Second operand 6 states and 141 transitions. [2024-06-21 15:44:07,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 266 transitions, 3373 flow [2024-06-21 15:44:07,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 266 transitions, 3235 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:07,763 INFO L231 Difference]: Finished difference. Result has 214 places, 253 transitions, 2787 flow [2024-06-21 15:44:07,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2787, PETRI_PLACES=214, PETRI_TRANSITIONS=253} [2024-06-21 15:44:07,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 15:44:07,764 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 253 transitions, 2787 flow [2024-06-21 15:44:07,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:07,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:07,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:07,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:44:07,764 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:07,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash 620175299, now seen corresponding path program 6 times [2024-06-21 15:44:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:07,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970798348] [2024-06-21 15:44:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:07,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:07,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:07,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970798348] [2024-06-21 15:44:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970798348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984476355] [2024-06-21 15:44:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:07,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:07,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:07,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 253 transitions, 2787 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:07,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:07,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:07,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:08,243 INFO L124 PetriNetUnfolderBase]: 1513/2549 cut-off events. [2024-06-21 15:44:08,243 INFO L125 PetriNetUnfolderBase]: For 113372/113386 co-relation queries the response was YES. [2024-06-21 15:44:08,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2549 events. 1513/2549 cut-off events. For 113372/113386 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14719 event pairs, 349 based on Foata normal form. 15/2563 useless extension candidates. Maximal degree in co-relation 16186. Up to 2213 conditions per place. [2024-06-21 15:44:08,265 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-21 15:44:08,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 270 transitions, 3355 flow [2024-06-21 15:44:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:44:08,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 15:44:08,268 INFO L175 Difference]: Start difference. First operand has 214 places, 253 transitions, 2787 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:44:08,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 270 transitions, 3355 flow [2024-06-21 15:44:08,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 3233 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:08,485 INFO L231 Difference]: Finished difference. Result has 215 places, 253 transitions, 2789 flow [2024-06-21 15:44:08,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=215, PETRI_TRANSITIONS=253} [2024-06-21 15:44:08,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-21 15:44:08,485 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 253 transitions, 2789 flow [2024-06-21 15:44:08,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:08,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:08,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:08,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:44:08,486 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:08,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash 620169533, now seen corresponding path program 9 times [2024-06-21 15:44:08,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:08,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75847306] [2024-06-21 15:44:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:08,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:08,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:08,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75847306] [2024-06-21 15:44:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75847306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:08,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:08,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032179197] [2024-06-21 15:44:08,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:08,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:08,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:08,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:08,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 253 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:08,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:08,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:08,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:09,005 INFO L124 PetriNetUnfolderBase]: 1510/2545 cut-off events. [2024-06-21 15:44:09,005 INFO L125 PetriNetUnfolderBase]: For 112095/112109 co-relation queries the response was YES. [2024-06-21 15:44:09,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16222 conditions, 2545 events. 1510/2545 cut-off events. For 112095/112109 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14686 event pairs, 349 based on Foata normal form. 15/2559 useless extension candidates. Maximal degree in co-relation 16122. Up to 2173 conditions per place. [2024-06-21 15:44:09,028 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 208 selfloop transitions, 60 changer transitions 0/275 dead transitions. [2024-06-21 15:44:09,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 275 transitions, 3381 flow [2024-06-21 15:44:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:44:09,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:44:09,029 INFO L175 Difference]: Start difference. First operand has 215 places, 253 transitions, 2789 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:44:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 275 transitions, 3381 flow [2024-06-21 15:44:09,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 3205 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:09,238 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 2745 flow [2024-06-21 15:44:09,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2745, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-21 15:44:09,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 15:44:09,239 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 2745 flow [2024-06-21 15:44:09,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:09,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:09,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:09,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:44:09,239 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:09,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash -368055421, now seen corresponding path program 7 times [2024-06-21 15:44:09,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:09,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870651355] [2024-06-21 15:44:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:09,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870651355] [2024-06-21 15:44:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870651355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:09,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:09,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628968809] [2024-06-21 15:44:09,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:09,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:09,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:09,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:09,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:09,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:09,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:09,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:09,666 INFO L124 PetriNetUnfolderBase]: 1515/2551 cut-off events. [2024-06-21 15:44:09,666 INFO L125 PetriNetUnfolderBase]: For 112391/112401 co-relation queries the response was YES. [2024-06-21 15:44:09,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16269 conditions, 2551 events. 1515/2551 cut-off events. For 112391/112401 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14715 event pairs, 371 based on Foata normal form. 8/2557 useless extension candidates. Maximal degree in co-relation 16169. Up to 2180 conditions per place. [2024-06-21 15:44:09,688 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 74 changer transitions 0/267 dead transitions. [2024-06-21 15:44:09,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 267 transitions, 3430 flow [2024-06-21 15:44:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 15:44:09,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 15:44:09,689 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 2745 flow. Second operand 6 states and 138 transitions. [2024-06-21 15:44:09,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 267 transitions, 3430 flow [2024-06-21 15:44:09,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 267 transitions, 3301 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:09,896 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 2811 flow [2024-06-21 15:44:09,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2811, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-21 15:44:09,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 15:44:09,897 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 2811 flow [2024-06-21 15:44:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:09,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:09,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:44:09,897 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash -379017517, now seen corresponding path program 10 times [2024-06-21 15:44:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747799846] [2024-06-21 15:44:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:09,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:09,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747799846] [2024-06-21 15:44:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747799846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291181505] [2024-06-21 15:44:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:10,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:10,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 2811 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:10,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:10,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:10,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:10,378 INFO L124 PetriNetUnfolderBase]: 1512/2548 cut-off events. [2024-06-21 15:44:10,379 INFO L125 PetriNetUnfolderBase]: For 110827/110841 co-relation queries the response was YES. [2024-06-21 15:44:10,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16187 conditions, 2548 events. 1512/2548 cut-off events. For 110827/110841 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14707 event pairs, 349 based on Foata normal form. 15/2562 useless extension candidates. Maximal degree in co-relation 16087. Up to 2140 conditions per place. [2024-06-21 15:44:10,403 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 196 selfloop transitions, 83 changer transitions 0/286 dead transitions. [2024-06-21 15:44:10,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 3445 flow [2024-06-21 15:44:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 15:44:10,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-21 15:44:10,404 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 2811 flow. Second operand 8 states and 193 transitions. [2024-06-21 15:44:10,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 3445 flow [2024-06-21 15:44:10,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 286 transitions, 3308 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:10,674 INFO L231 Difference]: Finished difference. Result has 218 places, 256 transitions, 2858 flow [2024-06-21 15:44:10,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2858, PETRI_PLACES=218, PETRI_TRANSITIONS=256} [2024-06-21 15:44:10,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 15:44:10,675 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 256 transitions, 2858 flow [2024-06-21 15:44:10,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:10,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:10,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:44:10,676 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:10,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -378780181, now seen corresponding path program 8 times [2024-06-21 15:44:10,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:10,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440253908] [2024-06-21 15:44:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:10,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:10,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440253908] [2024-06-21 15:44:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440253908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:10,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:10,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363308788] [2024-06-21 15:44:10,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:10,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:10,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:10,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:10,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 256 transitions, 2858 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:10,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:10,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:10,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:11,130 INFO L124 PetriNetUnfolderBase]: 1517/2557 cut-off events. [2024-06-21 15:44:11,130 INFO L125 PetriNetUnfolderBase]: For 115138/115152 co-relation queries the response was YES. [2024-06-21 15:44:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16391 conditions, 2557 events. 1517/2557 cut-off events. For 115138/115152 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14798 event pairs, 349 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16290. Up to 2182 conditions per place. [2024-06-21 15:44:11,153 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 82 changer transitions 0/278 dead transitions. [2024-06-21 15:44:11,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 278 transitions, 3590 flow [2024-06-21 15:44:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 15:44:11,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 15:44:11,154 INFO L175 Difference]: Start difference. First operand has 218 places, 256 transitions, 2858 flow. Second operand 8 states and 181 transitions. [2024-06-21 15:44:11,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 278 transitions, 3590 flow [2024-06-21 15:44:11,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 3408 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:11,347 INFO L231 Difference]: Finished difference. Result has 218 places, 259 transitions, 2898 flow [2024-06-21 15:44:11,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2898, PETRI_PLACES=218, PETRI_TRANSITIONS=259} [2024-06-21 15:44:11,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 15:44:11,348 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 259 transitions, 2898 flow [2024-06-21 15:44:11,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:11,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:11,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:11,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:44:11,348 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:11,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -379017331, now seen corresponding path program 9 times [2024-06-21 15:44:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106790398] [2024-06-21 15:44:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:11,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106790398] [2024-06-21 15:44:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106790398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:11,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084797483] [2024-06-21 15:44:11,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:11,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:11,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 259 transitions, 2898 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:11,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:11,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:11,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:11,858 INFO L124 PetriNetUnfolderBase]: 1514/2553 cut-off events. [2024-06-21 15:44:11,858 INFO L125 PetriNetUnfolderBase]: For 105977/105991 co-relation queries the response was YES. [2024-06-21 15:44:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2553 events. 1514/2553 cut-off events. For 105977/105991 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14767 event pairs, 349 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16022. Up to 2179 conditions per place. [2024-06-21 15:44:11,879 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 188 selfloop transitions, 86 changer transitions 0/281 dead transitions. [2024-06-21 15:44:11,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 281 transitions, 3500 flow [2024-06-21 15:44:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 15:44:11,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 15:44:11,880 INFO L175 Difference]: Start difference. First operand has 218 places, 259 transitions, 2898 flow. Second operand 9 states and 201 transitions. [2024-06-21 15:44:11,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 281 transitions, 3500 flow [2024-06-21 15:44:12,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 281 transitions, 3272 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:12,060 INFO L231 Difference]: Finished difference. Result has 220 places, 259 transitions, 2856 flow [2024-06-21 15:44:12,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2856, PETRI_PLACES=220, PETRI_TRANSITIONS=259} [2024-06-21 15:44:12,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 15:44:12,060 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 259 transitions, 2856 flow [2024-06-21 15:44:12,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:12,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:12,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:44:12,061 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:12,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash -368058397, now seen corresponding path program 4 times [2024-06-21 15:44:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:12,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943910247] [2024-06-21 15:44:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:12,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943910247] [2024-06-21 15:44:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943910247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:12,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:12,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:12,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104149455] [2024-06-21 15:44:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:12,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:12,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 259 transitions, 2856 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:12,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:12,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:12,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:12,535 INFO L124 PetriNetUnfolderBase]: 1542/2592 cut-off events. [2024-06-21 15:44:12,535 INFO L125 PetriNetUnfolderBase]: For 114272/114276 co-relation queries the response was YES. [2024-06-21 15:44:12,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16329 conditions, 2592 events. 1542/2592 cut-off events. For 114272/114276 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14975 event pairs, 341 based on Foata normal form. 9/2599 useless extension candidates. Maximal degree in co-relation 16228. Up to 2296 conditions per place. [2024-06-21 15:44:12,559 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 242 selfloop transitions, 27 changer transitions 0/276 dead transitions. [2024-06-21 15:44:12,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 276 transitions, 3477 flow [2024-06-21 15:44:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 15:44:12,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 15:44:12,560 INFO L175 Difference]: Start difference. First operand has 220 places, 259 transitions, 2856 flow. Second operand 6 states and 136 transitions. [2024-06-21 15:44:12,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 276 transitions, 3477 flow [2024-06-21 15:44:12,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 276 transitions, 3277 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:44:12,733 INFO L231 Difference]: Finished difference. Result has 216 places, 260 transitions, 2730 flow [2024-06-21 15:44:12,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2730, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2024-06-21 15:44:12,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 15:44:12,734 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 2730 flow [2024-06-21 15:44:12,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:12,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:12,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:12,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:44:12,734 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:12,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash -378783157, now seen corresponding path program 5 times [2024-06-21 15:44:12,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:12,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333622289] [2024-06-21 15:44:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:12,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333622289] [2024-06-21 15:44:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333622289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:12,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:12,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688282643] [2024-06-21 15:44:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:12,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:12,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:12,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:12,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:12,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 2730 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:12,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:12,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:12,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:13,248 INFO L124 PetriNetUnfolderBase]: 1557/2624 cut-off events. [2024-06-21 15:44:13,248 INFO L125 PetriNetUnfolderBase]: For 107392/107400 co-relation queries the response was YES. [2024-06-21 15:44:13,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16198 conditions, 2624 events. 1557/2624 cut-off events. For 107392/107400 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15212 event pairs, 337 based on Foata normal form. 16/2639 useless extension candidates. Maximal degree in co-relation 16098. Up to 2289 conditions per place. [2024-06-21 15:44:13,269 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 248 selfloop transitions, 30 changer transitions 0/285 dead transitions. [2024-06-21 15:44:13,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 285 transitions, 3391 flow [2024-06-21 15:44:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 15:44:13,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-21 15:44:13,270 INFO L175 Difference]: Start difference. First operand has 216 places, 260 transitions, 2730 flow. Second operand 8 states and 177 transitions. [2024-06-21 15:44:13,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 285 transitions, 3391 flow [2024-06-21 15:44:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 3334 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:13,439 INFO L231 Difference]: Finished difference. Result has 220 places, 261 transitions, 2758 flow [2024-06-21 15:44:13,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2758, PETRI_PLACES=220, PETRI_TRANSITIONS=261} [2024-06-21 15:44:13,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 15:44:13,439 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 261 transitions, 2758 flow [2024-06-21 15:44:13,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:13,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:13,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:13,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:44:13,440 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:13,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -379109587, now seen corresponding path program 6 times [2024-06-21 15:44:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571313926] [2024-06-21 15:44:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:13,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:13,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571313926] [2024-06-21 15:44:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571313926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:13,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278135173] [2024-06-21 15:44:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:13,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:13,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 261 transitions, 2758 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:13,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:13,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:13,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:13,939 INFO L124 PetriNetUnfolderBase]: 1544/2605 cut-off events. [2024-06-21 15:44:13,939 INFO L125 PetriNetUnfolderBase]: For 102056/102064 co-relation queries the response was YES. [2024-06-21 15:44:13,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15913 conditions, 2605 events. 1544/2605 cut-off events. For 102056/102064 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15112 event pairs, 245 based on Foata normal form. 14/2618 useless extension candidates. Maximal degree in co-relation 15812. Up to 2116 conditions per place. [2024-06-21 15:44:13,963 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 243 selfloop transitions, 41 changer transitions 0/291 dead transitions. [2024-06-21 15:44:13,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 291 transitions, 3444 flow [2024-06-21 15:44:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 15:44:13,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 15:44:13,964 INFO L175 Difference]: Start difference. First operand has 220 places, 261 transitions, 2758 flow. Second operand 8 states and 183 transitions. [2024-06-21 15:44:13,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 291 transitions, 3444 flow [2024-06-21 15:44:14,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 291 transitions, 3376 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:14,149 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 2780 flow [2024-06-21 15:44:14,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-21 15:44:14,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 15:44:14,150 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 2780 flow [2024-06-21 15:44:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:14,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:14,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:44:14,150 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:14,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -367658683, now seen corresponding path program 1 times [2024-06-21 15:44:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078212619] [2024-06-21 15:44:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:14,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:14,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078212619] [2024-06-21 15:44:14,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078212619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:14,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:14,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:14,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541783457] [2024-06-21 15:44:14,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:14,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:14,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:14,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:14,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:14,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 2780 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:14,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:14,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:14,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:14,664 INFO L124 PetriNetUnfolderBase]: 1564/2634 cut-off events. [2024-06-21 15:44:14,665 INFO L125 PetriNetUnfolderBase]: For 102807/102811 co-relation queries the response was YES. [2024-06-21 15:44:14,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 2634 events. 1564/2634 cut-off events. For 102807/102811 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15239 event pairs, 335 based on Foata normal form. 7/2639 useless extension candidates. Maximal degree in co-relation 16011. Up to 2234 conditions per place. [2024-06-21 15:44:14,689 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 32 changer transitions 0/284 dead transitions. [2024-06-21 15:44:14,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 284 transitions, 3456 flow [2024-06-21 15:44:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 15:44:14,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-21 15:44:14,690 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 2780 flow. Second operand 6 states and 139 transitions. [2024-06-21 15:44:14,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 284 transitions, 3456 flow [2024-06-21 15:44:14,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 284 transitions, 3368 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:14,879 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 2812 flow [2024-06-21 15:44:14,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2812, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-21 15:44:14,880 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 15:44:14,880 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 2812 flow [2024-06-21 15:44:14,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:14,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:14,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:14,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:44:14,880 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:14,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1449083601, now seen corresponding path program 4 times [2024-06-21 15:44:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:14,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197925655] [2024-06-21 15:44:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:14,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:14,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197925655] [2024-06-21 15:44:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197925655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:14,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:14,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222091757] [2024-06-21 15:44:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:14,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:15,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 2812 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:15,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:15,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:15,316 INFO L124 PetriNetUnfolderBase]: 1569/2648 cut-off events. [2024-06-21 15:44:15,316 INFO L125 PetriNetUnfolderBase]: For 93756/93770 co-relation queries the response was YES. [2024-06-21 15:44:15,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 2648 events. 1569/2648 cut-off events. For 93756/93770 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15454 event pairs, 361 based on Foata normal form. 15/2662 useless extension candidates. Maximal degree in co-relation 16036. Up to 2271 conditions per place. [2024-06-21 15:44:15,342 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 214 selfloop transitions, 65 changer transitions 0/286 dead transitions. [2024-06-21 15:44:15,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 286 transitions, 3610 flow [2024-06-21 15:44:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:44:15,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:44:15,343 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 2812 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:44:15,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 286 transitions, 3610 flow [2024-06-21 15:44:15,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 3571 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 15:44:15,541 INFO L231 Difference]: Finished difference. Result has 227 places, 271 transitions, 3023 flow [2024-06-21 15:44:15,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3023, PETRI_PLACES=227, PETRI_TRANSITIONS=271} [2024-06-21 15:44:15,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 15:44:15,542 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 271 transitions, 3023 flow [2024-06-21 15:44:15,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:15,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:15,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:15,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:44:15,543 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:15,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1111954481, now seen corresponding path program 5 times [2024-06-21 15:44:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:15,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991265814] [2024-06-21 15:44:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:15,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991265814] [2024-06-21 15:44:15,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991265814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:15,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:15,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066792987] [2024-06-21 15:44:15,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:15,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:15,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:15,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 271 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:15,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:15,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:15,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:16,112 INFO L124 PetriNetUnfolderBase]: 1566/2646 cut-off events. [2024-06-21 15:44:16,113 INFO L125 PetriNetUnfolderBase]: For 97261/97275 co-relation queries the response was YES. [2024-06-21 15:44:16,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 2646 events. 1566/2646 cut-off events. For 97261/97275 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15423 event pairs, 357 based on Foata normal form. 15/2660 useless extension candidates. Maximal degree in co-relation 16345. Up to 2331 conditions per place. [2024-06-21 15:44:16,138 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 247 selfloop transitions, 33 changer transitions 0/287 dead transitions. [2024-06-21 15:44:16,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 287 transitions, 3623 flow [2024-06-21 15:44:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 15:44:16,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:44:16,139 INFO L175 Difference]: Start difference. First operand has 227 places, 271 transitions, 3023 flow. Second operand 6 states and 141 transitions. [2024-06-21 15:44:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 287 transitions, 3623 flow [2024-06-21 15:44:16,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3503 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:16,361 INFO L231 Difference]: Finished difference. Result has 230 places, 271 transitions, 2975 flow [2024-06-21 15:44:16,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2975, PETRI_PLACES=230, PETRI_TRANSITIONS=271} [2024-06-21 15:44:16,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 15:44:16,362 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 271 transitions, 2975 flow [2024-06-21 15:44:16,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:16,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:16,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:16,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:44:16,363 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:16,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1112370191, now seen corresponding path program 6 times [2024-06-21 15:44:16,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:16,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553916191] [2024-06-21 15:44:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:16,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553916191] [2024-06-21 15:44:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553916191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:16,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:16,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:16,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673158750] [2024-06-21 15:44:16,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:16,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:16,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:16,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:16,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:16,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:16,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 271 transitions, 2975 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:16,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:16,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:16,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:16,862 INFO L124 PetriNetUnfolderBase]: 1571/2651 cut-off events. [2024-06-21 15:44:16,862 INFO L125 PetriNetUnfolderBase]: For 99431/99443 co-relation queries the response was YES. [2024-06-21 15:44:16,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 2651 events. 1571/2651 cut-off events. For 99431/99443 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15464 event pairs, 361 based on Foata normal form. 13/2663 useless extension candidates. Maximal degree in co-relation 16286. Up to 2293 conditions per place. [2024-06-21 15:44:16,887 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 58 changer transitions 0/288 dead transitions. [2024-06-21 15:44:16,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 288 transitions, 3727 flow [2024-06-21 15:44:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 15:44:16,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:44:16,888 INFO L175 Difference]: Start difference. First operand has 230 places, 271 transitions, 2975 flow. Second operand 6 states and 141 transitions. [2024-06-21 15:44:16,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 288 transitions, 3727 flow [2024-06-21 15:44:17,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 288 transitions, 3555 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:17,119 INFO L231 Difference]: Finished difference. Result has 229 places, 274 transitions, 2981 flow [2024-06-21 15:44:17,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2981, PETRI_PLACES=229, PETRI_TRANSITIONS=274} [2024-06-21 15:44:17,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 15:44:17,120 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 274 transitions, 2981 flow [2024-06-21 15:44:17,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:17,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:17,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:44:17,120 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495235, now seen corresponding path program 10 times [2024-06-21 15:44:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642558332] [2024-06-21 15:44:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:17,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:17,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642558332] [2024-06-21 15:44:17,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642558332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:17,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:17,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:17,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533101027] [2024-06-21 15:44:17,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:17,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:17,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:17,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:17,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 274 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:17,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:17,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:17,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:17,643 INFO L124 PetriNetUnfolderBase]: 1576/2658 cut-off events. [2024-06-21 15:44:17,643 INFO L125 PetriNetUnfolderBase]: For 102895/102907 co-relation queries the response was YES. [2024-06-21 15:44:17,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16400 conditions, 2658 events. 1576/2658 cut-off events. For 102895/102907 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15505 event pairs, 355 based on Foata normal form. 13/2670 useless extension candidates. Maximal degree in co-relation 16294. Up to 2300 conditions per place. [2024-06-21 15:44:17,666 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 220 selfloop transitions, 68 changer transitions 0/295 dead transitions. [2024-06-21 15:44:17,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 295 transitions, 3655 flow [2024-06-21 15:44:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 15:44:17,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 15:44:17,667 INFO L175 Difference]: Start difference. First operand has 229 places, 274 transitions, 2981 flow. Second operand 8 states and 181 transitions. [2024-06-21 15:44:17,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 295 transitions, 3655 flow [2024-06-21 15:44:17,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 295 transitions, 3491 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:17,873 INFO L231 Difference]: Finished difference. Result has 233 places, 277 transitions, 3023 flow [2024-06-21 15:44:17,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=233, PETRI_TRANSITIONS=277} [2024-06-21 15:44:17,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 15:44:17,874 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 277 transitions, 3023 flow [2024-06-21 15:44:17,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:17,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:17,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:17,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:44:17,874 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:17,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495421, now seen corresponding path program 7 times [2024-06-21 15:44:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088986589] [2024-06-21 15:44:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:17,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088986589] [2024-06-21 15:44:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088986589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:17,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:17,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:17,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594569679] [2024-06-21 15:44:17,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:17,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:17,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:17,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:18,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:18,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 277 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:18,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:18,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:18,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:18,391 INFO L124 PetriNetUnfolderBase]: 1581/2669 cut-off events. [2024-06-21 15:44:18,391 INFO L125 PetriNetUnfolderBase]: For 106634/106646 co-relation queries the response was YES. [2024-06-21 15:44:18,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16734 conditions, 2669 events. 1581/2669 cut-off events. For 106634/106646 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15586 event pairs, 357 based on Foata normal form. 13/2681 useless extension candidates. Maximal degree in co-relation 16627. Up to 2306 conditions per place. [2024-06-21 15:44:18,416 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 222 selfloop transitions, 68 changer transitions 0/297 dead transitions. [2024-06-21 15:44:18,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 297 transitions, 3803 flow [2024-06-21 15:44:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 15:44:18,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-21 15:44:18,417 INFO L175 Difference]: Start difference. First operand has 233 places, 277 transitions, 3023 flow. Second operand 9 states and 196 transitions. [2024-06-21 15:44:18,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 297 transitions, 3803 flow [2024-06-21 15:44:18,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 297 transitions, 3631 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:18,659 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3049 flow [2024-06-21 15:44:18,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3049, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-21 15:44:18,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 15:44:18,659 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3049 flow [2024-06-21 15:44:18,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:18,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:18,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:18,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:44:18,660 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:18,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1117732571, now seen corresponding path program 8 times [2024-06-21 15:44:18,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:18,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193567591] [2024-06-21 15:44:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:18,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:18,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193567591] [2024-06-21 15:44:18,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193567591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:18,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:18,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909639913] [2024-06-21 15:44:18,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:18,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:18,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3049 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:18,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:18,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:18,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:19,132 INFO L124 PetriNetUnfolderBase]: 1578/2665 cut-off events. [2024-06-21 15:44:19,132 INFO L125 PetriNetUnfolderBase]: For 108576/108588 co-relation queries the response was YES. [2024-06-21 15:44:19,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16684 conditions, 2665 events. 1578/2665 cut-off events. For 108576/108588 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15568 event pairs, 357 based on Foata normal form. 13/2677 useless extension candidates. Maximal degree in co-relation 16576. Up to 2303 conditions per place. [2024-06-21 15:44:19,204 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 65 changer transitions 0/295 dead transitions. [2024-06-21 15:44:19,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 295 transitions, 3661 flow [2024-06-21 15:44:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 15:44:19,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-21 15:44:19,205 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3049 flow. Second operand 8 states and 177 transitions. [2024-06-21 15:44:19,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 295 transitions, 3661 flow [2024-06-21 15:44:19,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 295 transitions, 3402 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:19,464 INFO L231 Difference]: Finished difference. Result has 237 places, 280 transitions, 2926 flow [2024-06-21 15:44:19,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=237, PETRI_TRANSITIONS=280} [2024-06-21 15:44:19,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 15:44:19,464 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 280 transitions, 2926 flow [2024-06-21 15:44:19,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:19,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:19,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:19,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:44:19,465 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:19,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 553585411, now seen corresponding path program 11 times [2024-06-21 15:44:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850908545] [2024-06-21 15:44:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:19,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:19,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850908545] [2024-06-21 15:44:19,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850908545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:19,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:19,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:19,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132524214] [2024-06-21 15:44:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:19,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:19,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:19,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:19,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:19,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 280 transitions, 2926 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:19,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:19,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:19,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:19,911 INFO L124 PetriNetUnfolderBase]: 1575/2654 cut-off events. [2024-06-21 15:44:19,912 INFO L125 PetriNetUnfolderBase]: For 110661/110669 co-relation queries the response was YES. [2024-06-21 15:44:19,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16458 conditions, 2654 events. 1575/2654 cut-off events. For 110661/110669 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15449 event pairs, 377 based on Foata normal form. 6/2658 useless extension candidates. Maximal degree in co-relation 16350. Up to 2260 conditions per place. [2024-06-21 15:44:19,938 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 199 selfloop transitions, 88 changer transitions 0/294 dead transitions. [2024-06-21 15:44:19,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 294 transitions, 3586 flow [2024-06-21 15:44:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 15:44:19,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-21 15:44:19,939 INFO L175 Difference]: Start difference. First operand has 237 places, 280 transitions, 2926 flow. Second operand 7 states and 156 transitions. [2024-06-21 15:44:19,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 294 transitions, 3586 flow [2024-06-21 15:44:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 294 transitions, 3408 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:20,170 INFO L231 Difference]: Finished difference. Result has 236 places, 283 transitions, 2996 flow [2024-06-21 15:44:20,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2996, PETRI_PLACES=236, PETRI_TRANSITIONS=283} [2024-06-21 15:44:20,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 15:44:20,171 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 283 transitions, 2996 flow [2024-06-21 15:44:20,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:20,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:20,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:20,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:44:20,171 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:20,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash 553582435, now seen corresponding path program 7 times [2024-06-21 15:44:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:20,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503618475] [2024-06-21 15:44:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:20,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:20,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503618475] [2024-06-21 15:44:20,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503618475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:20,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:20,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:20,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094495055] [2024-06-21 15:44:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:20,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:20,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 283 transitions, 2996 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:20,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:20,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:20,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:20,632 INFO L124 PetriNetUnfolderBase]: 1590/2681 cut-off events. [2024-06-21 15:44:20,632 INFO L125 PetriNetUnfolderBase]: For 117900/117904 co-relation queries the response was YES. [2024-06-21 15:44:20,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16513 conditions, 2681 events. 1590/2681 cut-off events. For 117900/117904 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 15621 event pairs, 348 based on Foata normal form. 9/2688 useless extension candidates. Maximal degree in co-relation 16404. Up to 2369 conditions per place. [2024-06-21 15:44:20,657 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 262 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2024-06-21 15:44:20,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 301 transitions, 3672 flow [2024-06-21 15:44:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-21 15:44:20,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:44:20,658 INFO L175 Difference]: Start difference. First operand has 236 places, 283 transitions, 2996 flow. Second operand 7 states and 154 transitions. [2024-06-21 15:44:20,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 301 transitions, 3672 flow [2024-06-21 15:44:20,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 301 transitions, 3450 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:20,941 INFO L231 Difference]: Finished difference. Result has 238 places, 284 transitions, 2857 flow [2024-06-21 15:44:20,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2857, PETRI_PLACES=238, PETRI_TRANSITIONS=284} [2024-06-21 15:44:20,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-21 15:44:20,942 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 284 transitions, 2857 flow [2024-06-21 15:44:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:20,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:20,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:20,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:44:20,942 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:20,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 553982149, now seen corresponding path program 2 times [2024-06-21 15:44:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:20,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149790142] [2024-06-21 15:44:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149790142] [2024-06-21 15:44:21,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149790142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:21,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:21,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:21,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864924810] [2024-06-21 15:44:21,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:21,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:21,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:21,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:21,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:21,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:21,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 284 transitions, 2857 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:21,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:21,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:21,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:21,450 INFO L124 PetriNetUnfolderBase]: 1610/2717 cut-off events. [2024-06-21 15:44:21,450 INFO L125 PetriNetUnfolderBase]: For 118800/118804 co-relation queries the response was YES. [2024-06-21 15:44:21,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16646 conditions, 2717 events. 1610/2717 cut-off events. For 118800/118804 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15899 event pairs, 348 based on Foata normal form. 7/2722 useless extension candidates. Maximal degree in co-relation 16536. Up to 2371 conditions per place. [2024-06-21 15:44:21,476 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 266 selfloop transitions, 34 changer transitions 0/307 dead transitions. [2024-06-21 15:44:21,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 307 transitions, 3587 flow [2024-06-21 15:44:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 15:44:21,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 15:44:21,477 INFO L175 Difference]: Start difference. First operand has 238 places, 284 transitions, 2857 flow. Second operand 7 states and 157 transitions. [2024-06-21 15:44:21,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 307 transitions, 3587 flow [2024-06-21 15:44:21,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 3518 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:21,752 INFO L231 Difference]: Finished difference. Result has 241 places, 287 transitions, 2902 flow [2024-06-21 15:44:21,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2902, PETRI_PLACES=241, PETRI_TRANSITIONS=287} [2024-06-21 15:44:21,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 15:44:21,753 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 287 transitions, 2902 flow [2024-06-21 15:44:21,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:21,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:21,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:21,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:44:21,753 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:21,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash 996810949, now seen corresponding path program 3 times [2024-06-21 15:44:21,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:21,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171498850] [2024-06-21 15:44:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171498850] [2024-06-21 15:44:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171498850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:21,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:21,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:21,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825395336] [2024-06-21 15:44:21,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:21,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:21,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:21,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 287 transitions, 2902 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:21,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:21,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:22,241 INFO L124 PetriNetUnfolderBase]: 1597/2698 cut-off events. [2024-06-21 15:44:22,241 INFO L125 PetriNetUnfolderBase]: For 113402/113406 co-relation queries the response was YES. [2024-06-21 15:44:22,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16301 conditions, 2698 events. 1597/2698 cut-off events. For 113402/113406 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15726 event pairs, 339 based on Foata normal form. 7/2703 useless extension candidates. Maximal degree in co-relation 16189. Up to 2188 conditions per place. [2024-06-21 15:44:22,269 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 262 selfloop transitions, 41 changer transitions 0/310 dead transitions. [2024-06-21 15:44:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 310 transitions, 3628 flow [2024-06-21 15:44:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 15:44:22,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 15:44:22,271 INFO L175 Difference]: Start difference. First operand has 241 places, 287 transitions, 2902 flow. Second operand 7 states and 157 transitions. [2024-06-21 15:44:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 310 transitions, 3628 flow [2024-06-21 15:44:22,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 310 transitions, 3546 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:22,543 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 2931 flow [2024-06-21 15:44:22,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-21 15:44:22,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 15:44:22,544 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 2931 flow [2024-06-21 15:44:22,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:22,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:22,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:44:22,544 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:22,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1537788303, now seen corresponding path program 1 times [2024-06-21 15:44:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114827431] [2024-06-21 15:44:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:22,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:22,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114827431] [2024-06-21 15:44:22,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114827431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:22,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:22,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301862058] [2024-06-21 15:44:22,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:22,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:22,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:22,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:22,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:22,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 2931 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:22,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:22,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:22,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:23,043 INFO L124 PetriNetUnfolderBase]: 1650/2787 cut-off events. [2024-06-21 15:44:23,043 INFO L125 PetriNetUnfolderBase]: For 126647/126651 co-relation queries the response was YES. [2024-06-21 15:44:23,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17058 conditions, 2787 events. 1650/2787 cut-off events. For 126647/126651 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 16396 event pairs, 346 based on Foata normal form. 10/2796 useless extension candidates. Maximal degree in co-relation 16944. Up to 2385 conditions per place. [2024-06-21 15:44:23,071 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 290 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-21 15:44:23,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 325 transitions, 3851 flow [2024-06-21 15:44:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 15:44:23,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 15:44:23,072 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 2931 flow. Second operand 7 states and 164 transitions. [2024-06-21 15:44:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 325 transitions, 3851 flow [2024-06-21 15:44:23,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 325 transitions, 3700 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:23,335 INFO L231 Difference]: Finished difference. Result has 248 places, 294 transitions, 2899 flow [2024-06-21 15:44:23,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2899, PETRI_PLACES=248, PETRI_TRANSITIONS=294} [2024-06-21 15:44:23,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-21 15:44:23,336 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 294 transitions, 2899 flow [2024-06-21 15:44:23,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:23,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:23,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:44:23,336 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:23,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash -568477521, now seen corresponding path program 2 times [2024-06-21 15:44:23,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:23,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842999435] [2024-06-21 15:44:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:23,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:23,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842999435] [2024-06-21 15:44:23,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842999435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:23,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:23,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:23,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895148609] [2024-06-21 15:44:23,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:23,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:23,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:23,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:23,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 294 transitions, 2899 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:23,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:23,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:23,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:23,865 INFO L124 PetriNetUnfolderBase]: 1678/2835 cut-off events. [2024-06-21 15:44:23,866 INFO L125 PetriNetUnfolderBase]: For 133770/133774 co-relation queries the response was YES. [2024-06-21 15:44:23,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17069 conditions, 2835 events. 1678/2835 cut-off events. For 133770/133774 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16741 event pairs, 360 based on Foata normal form. 12/2846 useless extension candidates. Maximal degree in co-relation 16954. Up to 2525 conditions per place. [2024-06-21 15:44:23,894 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 283 selfloop transitions, 26 changer transitions 0/316 dead transitions. [2024-06-21 15:44:23,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 316 transitions, 3613 flow [2024-06-21 15:44:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 15:44:23,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 15:44:23,895 INFO L175 Difference]: Start difference. First operand has 248 places, 294 transitions, 2899 flow. Second operand 7 states and 157 transitions. [2024-06-21 15:44:23,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 316 transitions, 3613 flow [2024-06-21 15:44:24,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 316 transitions, 3581 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 15:44:24,206 INFO L231 Difference]: Finished difference. Result has 253 places, 295 transitions, 2935 flow [2024-06-21 15:44:24,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2867, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2935, PETRI_PLACES=253, PETRI_TRANSITIONS=295} [2024-06-21 15:44:24,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 15:44:24,206 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 295 transitions, 2935 flow [2024-06-21 15:44:24,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:24,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:24,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:24,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:44:24,207 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:24,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash -568625391, now seen corresponding path program 3 times [2024-06-21 15:44:24,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:24,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492020960] [2024-06-21 15:44:24,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:24,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:24,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492020960] [2024-06-21 15:44:24,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492020960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:24,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:24,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124108065] [2024-06-21 15:44:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:24,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:24,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:24,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:24,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 295 transitions, 2935 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:24,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:24,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:24,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:24,727 INFO L124 PetriNetUnfolderBase]: 1698/2867 cut-off events. [2024-06-21 15:44:24,727 INFO L125 PetriNetUnfolderBase]: For 135209/135213 co-relation queries the response was YES. [2024-06-21 15:44:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17411 conditions, 2867 events. 1698/2867 cut-off events. For 135209/135213 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17034 event pairs, 358 based on Foata normal form. 10/2876 useless extension candidates. Maximal degree in co-relation 17294. Up to 2527 conditions per place. [2024-06-21 15:44:24,756 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 287 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-21 15:44:24,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 322 transitions, 3701 flow [2024-06-21 15:44:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:44:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:44:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:44:24,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:44:24,757 INFO L175 Difference]: Start difference. First operand has 253 places, 295 transitions, 2935 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:44:24,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 322 transitions, 3701 flow [2024-06-21 15:44:25,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 322 transitions, 3650 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:25,038 INFO L231 Difference]: Finished difference. Result has 256 places, 298 transitions, 2981 flow [2024-06-21 15:44:25,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2981, PETRI_PLACES=256, PETRI_TRANSITIONS=298} [2024-06-21 15:44:25,038 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 15:44:25,038 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 298 transitions, 2981 flow [2024-06-21 15:44:25,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:25,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:25,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:25,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:44:25,039 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:25,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1117741499, now seen corresponding path program 4 times [2024-06-21 15:44:25,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:25,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267266747] [2024-06-21 15:44:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267266747] [2024-06-21 15:44:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267266747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:25,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431357832] [2024-06-21 15:44:25,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:25,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:25,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:25,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:25,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:25,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 298 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:25,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:25,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:25,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:25,582 INFO L124 PetriNetUnfolderBase]: 1726/2911 cut-off events. [2024-06-21 15:44:25,582 INFO L125 PetriNetUnfolderBase]: For 143936/143940 co-relation queries the response was YES. [2024-06-21 15:44:25,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17802 conditions, 2911 events. 1726/2911 cut-off events. For 143936/143940 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17311 event pairs, 366 based on Foata normal form. 12/2922 useless extension candidates. Maximal degree in co-relation 17683. Up to 2607 conditions per place. [2024-06-21 15:44:25,613 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 291 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2024-06-21 15:44:25,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 321 transitions, 3711 flow [2024-06-21 15:44:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 15:44:25,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-21 15:44:25,614 INFO L175 Difference]: Start difference. First operand has 256 places, 298 transitions, 2981 flow. Second operand 8 states and 174 transitions. [2024-06-21 15:44:25,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 321 transitions, 3711 flow [2024-06-21 15:44:25,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 321 transitions, 3677 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 15:44:25,963 INFO L231 Difference]: Finished difference. Result has 261 places, 299 transitions, 3013 flow [2024-06-21 15:44:25,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=261, PETRI_TRANSITIONS=299} [2024-06-21 15:44:25,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 15:44:25,963 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 299 transitions, 3013 flow [2024-06-21 15:44:25,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:25,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:25,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:25,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:44:25,964 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:25,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1112234969, now seen corresponding path program 5 times [2024-06-21 15:44:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:25,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254829045] [2024-06-21 15:44:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:26,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:26,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254829045] [2024-06-21 15:44:26,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254829045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:26,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:26,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:26,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601985586] [2024-06-21 15:44:26,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:26,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:26,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:26,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:26,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:26,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 299 transitions, 3013 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:26,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:26,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:26,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:26,536 INFO L124 PetriNetUnfolderBase]: 1741/2940 cut-off events. [2024-06-21 15:44:26,536 INFO L125 PetriNetUnfolderBase]: For 144159/144163 co-relation queries the response was YES. [2024-06-21 15:44:26,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17990 conditions, 2940 events. 1741/2940 cut-off events. For 144159/144163 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17515 event pairs, 373 based on Foata normal form. 12/2951 useless extension candidates. Maximal degree in co-relation 17869. Up to 2632 conditions per place. [2024-06-21 15:44:26,567 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 292 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-21 15:44:26,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 320 transitions, 3739 flow [2024-06-21 15:44:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 15:44:26,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-21 15:44:26,568 INFO L175 Difference]: Start difference. First operand has 261 places, 299 transitions, 3013 flow. Second operand 6 states and 139 transitions. [2024-06-21 15:44:26,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 320 transitions, 3739 flow [2024-06-21 15:44:26,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 320 transitions, 3690 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:44:26,901 INFO L231 Difference]: Finished difference. Result has 261 places, 300 transitions, 3028 flow [2024-06-21 15:44:26,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3028, PETRI_PLACES=261, PETRI_TRANSITIONS=300} [2024-06-21 15:44:26,902 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 15:44:26,902 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 300 transitions, 3028 flow [2024-06-21 15:44:26,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:26,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:26,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:26,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:44:26,902 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:26,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1112231249, now seen corresponding path program 6 times [2024-06-21 15:44:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:26,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969439209] [2024-06-21 15:44:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:26,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969439209] [2024-06-21 15:44:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969439209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:27,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:27,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:27,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507925688] [2024-06-21 15:44:27,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:27,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:27,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:27,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:27,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 300 transitions, 3028 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:27,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:27,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:27,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:27,472 INFO L124 PetriNetUnfolderBase]: 1728/2921 cut-off events. [2024-06-21 15:44:27,472 INFO L125 PetriNetUnfolderBase]: For 133425/133429 co-relation queries the response was YES. [2024-06-21 15:44:27,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17580 conditions, 2921 events. 1728/2921 cut-off events. For 133425/133429 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17374 event pairs, 352 based on Foata normal form. 10/2930 useless extension candidates. Maximal degree in co-relation 17458. Up to 2533 conditions per place. [2024-06-21 15:44:27,503 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 296 selfloop transitions, 25 changer transitions 0/328 dead transitions. [2024-06-21 15:44:27,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 328 transitions, 3807 flow [2024-06-21 15:44:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:44:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:44:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 15:44:27,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 15:44:27,503 INFO L175 Difference]: Start difference. First operand has 261 places, 300 transitions, 3028 flow. Second operand 6 states and 145 transitions. [2024-06-21 15:44:27,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 328 transitions, 3807 flow [2024-06-21 15:44:27,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 328 transitions, 3756 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:27,803 INFO L231 Difference]: Finished difference. Result has 264 places, 302 transitions, 3066 flow [2024-06-21 15:44:27,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3066, PETRI_PLACES=264, PETRI_TRANSITIONS=302} [2024-06-21 15:44:27,804 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-21 15:44:27,804 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 302 transitions, 3066 flow [2024-06-21 15:44:27,804 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) [2024-06-21 15:44:27,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:27,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:27,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:44:27,804 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:27,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1117956701, now seen corresponding path program 1 times [2024-06-21 15:44:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:27,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413770430] [2024-06-21 15:44:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413770430] [2024-06-21 15:44:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413770430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:27,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:27,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:44:27,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498142357] [2024-06-21 15:44:27,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:27,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:44:27,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:27,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:44:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:44:27,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:27,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 302 transitions, 3066 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:27,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:27,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:27,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:28,375 INFO L124 PetriNetUnfolderBase]: 1715/2894 cut-off events. [2024-06-21 15:44:28,376 INFO L125 PetriNetUnfolderBase]: For 125423/125427 co-relation queries the response was YES. [2024-06-21 15:44:28,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17217 conditions, 2894 events. 1715/2894 cut-off events. For 125423/125427 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17179 event pairs, 341 based on Foata normal form. 10/2903 useless extension candidates. Maximal degree in co-relation 17093. Up to 2522 conditions per place. [2024-06-21 15:44:28,407 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 293 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2024-06-21 15:44:28,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 328 transitions, 3823 flow [2024-06-21 15:44:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 15:44:28,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-21 15:44:28,408 INFO L175 Difference]: Start difference. First operand has 264 places, 302 transitions, 3066 flow. Second operand 8 states and 177 transitions. [2024-06-21 15:44:28,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 328 transitions, 3823 flow [2024-06-21 15:44:28,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 328 transitions, 3737 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:28,802 INFO L231 Difference]: Finished difference. Result has 267 places, 302 transitions, 3040 flow [2024-06-21 15:44:28,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3040, PETRI_PLACES=267, PETRI_TRANSITIONS=302} [2024-06-21 15:44:28,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 15:44:28,802 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 302 transitions, 3040 flow [2024-06-21 15:44:28,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:28,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:28,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:28,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:44:28,803 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:28,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:28,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2066324371, now seen corresponding path program 1 times [2024-06-21 15:44:28,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:28,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825132030] [2024-06-21 15:44:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:28,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825132030] [2024-06-21 15:44:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825132030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:28,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:28,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728311796] [2024-06-21 15:44:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:28,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:28,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 302 transitions, 3040 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:28,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:28,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:28,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:29,401 INFO L124 PetriNetUnfolderBase]: 1736/2931 cut-off events. [2024-06-21 15:44:29,401 INFO L125 PetriNetUnfolderBase]: For 123274/123282 co-relation queries the response was YES. [2024-06-21 15:44:29,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 2931 events. 1736/2931 cut-off events. For 123274/123282 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 17487 event pairs, 397 based on Foata normal form. 9/2938 useless extension candidates. Maximal degree in co-relation 17357. Up to 2352 conditions per place. [2024-06-21 15:44:29,433 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 175 selfloop transitions, 159 changer transitions 0/341 dead transitions. [2024-06-21 15:44:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 341 transitions, 4186 flow [2024-06-21 15:44:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:44:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:44:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-21 15:44:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-21 15:44:29,434 INFO L175 Difference]: Start difference. First operand has 267 places, 302 transitions, 3040 flow. Second operand 12 states and 265 transitions. [2024-06-21 15:44:29,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 341 transitions, 4186 flow [2024-06-21 15:44:29,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 341 transitions, 4108 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:29,878 INFO L231 Difference]: Finished difference. Result has 272 places, 311 transitions, 3442 flow [2024-06-21 15:44:29,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3442, PETRI_PLACES=272, PETRI_TRANSITIONS=311} [2024-06-21 15:44:29,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-21 15:44:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 311 transitions, 3442 flow [2024-06-21 15:44:29,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:29,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:29,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:29,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:44:29,879 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:29,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1972116713, now seen corresponding path program 2 times [2024-06-21 15:44:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:29,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368123175] [2024-06-21 15:44:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:29,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:29,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:29,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368123175] [2024-06-21 15:44:29,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368123175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:29,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:29,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768575902] [2024-06-21 15:44:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:29,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:30,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:30,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 311 transitions, 3442 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:30,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:30,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:30,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:30,487 INFO L124 PetriNetUnfolderBase]: 1749/2954 cut-off events. [2024-06-21 15:44:30,488 INFO L125 PetriNetUnfolderBase]: For 131606/131618 co-relation queries the response was YES. [2024-06-21 15:44:30,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18176 conditions, 2954 events. 1749/2954 cut-off events. For 131606/131618 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17638 event pairs, 380 based on Foata normal form. 13/2966 useless extension candidates. Maximal degree in co-relation 18052. Up to 2542 conditions per place. [2024-06-21 15:44:30,519 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-21 15:44:30,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 343 transitions, 4418 flow [2024-06-21 15:44:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:44:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:44:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-21 15:44:30,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-21 15:44:30,520 INFO L175 Difference]: Start difference. First operand has 272 places, 311 transitions, 3442 flow. Second operand 12 states and 257 transitions. [2024-06-21 15:44:30,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 343 transitions, 4418 flow [2024-06-21 15:44:30,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 343 transitions, 4097 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:30,948 INFO L231 Difference]: Finished difference. Result has 277 places, 317 transitions, 3439 flow [2024-06-21 15:44:30,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3439, PETRI_PLACES=277, PETRI_TRANSITIONS=317} [2024-06-21 15:44:30,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 15:44:30,948 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 317 transitions, 3439 flow [2024-06-21 15:44:30,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:30,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:30,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:30,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:44:30,948 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:30,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1972122293, now seen corresponding path program 3 times [2024-06-21 15:44:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:30,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468679843] [2024-06-21 15:44:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:30,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:31,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468679843] [2024-06-21 15:44:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468679843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:31,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:31,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079881465] [2024-06-21 15:44:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:31,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:31,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:31,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:31,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:31,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 317 transitions, 3439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:31,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:31,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:31,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:31,572 INFO L124 PetriNetUnfolderBase]: 1746/2950 cut-off events. [2024-06-21 15:44:31,572 INFO L125 PetriNetUnfolderBase]: For 128633/128645 co-relation queries the response was YES. [2024-06-21 15:44:31,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18040 conditions, 2950 events. 1746/2950 cut-off events. For 128633/128645 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17658 event pairs, 380 based on Foata normal form. 13/2962 useless extension candidates. Maximal degree in co-relation 17914. Up to 2539 conditions per place. [2024-06-21 15:44:31,604 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-21 15:44:31,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 343 transitions, 4173 flow [2024-06-21 15:44:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:44:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:44:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-21 15:44:31,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 15:44:31,605 INFO L175 Difference]: Start difference. First operand has 277 places, 317 transitions, 3439 flow. Second operand 13 states and 273 transitions. [2024-06-21 15:44:31,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 343 transitions, 4173 flow [2024-06-21 15:44:32,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4030 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:32,134 INFO L231 Difference]: Finished difference. Result has 282 places, 317 transitions, 3494 flow [2024-06-21 15:44:32,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3494, PETRI_PLACES=282, PETRI_TRANSITIONS=317} [2024-06-21 15:44:32,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-21 15:44:32,134 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 317 transitions, 3494 flow [2024-06-21 15:44:32,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:32,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:32,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:32,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:44:32,135 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:32,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1119383529, now seen corresponding path program 4 times [2024-06-21 15:44:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:32,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536034701] [2024-06-21 15:44:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:32,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:32,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536034701] [2024-06-21 15:44:32,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536034701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:32,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:32,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:32,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557627827] [2024-06-21 15:44:32,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:32,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:32,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:32,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:32,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 317 transitions, 3494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:32,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:32,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:32,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:32,754 INFO L124 PetriNetUnfolderBase]: 1767/2985 cut-off events. [2024-06-21 15:44:32,755 INFO L125 PetriNetUnfolderBase]: For 136542/136554 co-relation queries the response was YES. [2024-06-21 15:44:32,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18546 conditions, 2985 events. 1767/2985 cut-off events. For 136542/136554 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17868 event pairs, 380 based on Foata normal form. 13/2997 useless extension candidates. Maximal degree in co-relation 18418. Up to 2547 conditions per place. [2024-06-21 15:44:32,788 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 108 changer transitions 0/349 dead transitions. [2024-06-21 15:44:32,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 349 transitions, 4468 flow [2024-06-21 15:44:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:44:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:44:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-21 15:44:32,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-21 15:44:32,789 INFO L175 Difference]: Start difference. First operand has 282 places, 317 transitions, 3494 flow. Second operand 12 states and 254 transitions. [2024-06-21 15:44:32,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 349 transitions, 4468 flow [2024-06-21 15:44:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 349 transitions, 4272 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:33,280 INFO L231 Difference]: Finished difference. Result has 283 places, 326 transitions, 3654 flow [2024-06-21 15:44:33,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3654, PETRI_PLACES=283, PETRI_TRANSITIONS=326} [2024-06-21 15:44:33,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 15:44:33,280 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 326 transitions, 3654 flow [2024-06-21 15:44:33,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:33,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:33,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:44:33,281 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:33,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1126735179, now seen corresponding path program 5 times [2024-06-21 15:44:33,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:33,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778958317] [2024-06-21 15:44:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778958317] [2024-06-21 15:44:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778958317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:33,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:33,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525339928] [2024-06-21 15:44:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:33,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:33,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:33,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:33,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 326 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:33,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:33,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:33,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:34,000 INFO L124 PetriNetUnfolderBase]: 1772/2994 cut-off events. [2024-06-21 15:44:34,001 INFO L125 PetriNetUnfolderBase]: For 140457/140469 co-relation queries the response was YES. [2024-06-21 15:44:34,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18738 conditions, 2994 events. 1772/2994 cut-off events. For 140457/140469 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17944 event pairs, 380 based on Foata normal form. 13/3006 useless extension candidates. Maximal degree in co-relation 18608. Up to 2553 conditions per place. [2024-06-21 15:44:34,035 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 110 changer transitions 0/356 dead transitions. [2024-06-21 15:44:34,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 356 transitions, 4725 flow [2024-06-21 15:44:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 15:44:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 15:44:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 311 transitions. [2024-06-21 15:44:34,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183333333333333 [2024-06-21 15:44:34,043 INFO L175 Difference]: Start difference. First operand has 283 places, 326 transitions, 3654 flow. Second operand 15 states and 311 transitions. [2024-06-21 15:44:34,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 356 transitions, 4725 flow [2024-06-21 15:44:34,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 356 transitions, 4572 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:34,656 INFO L231 Difference]: Finished difference. Result has 290 places, 329 transitions, 3770 flow [2024-06-21 15:44:34,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3770, PETRI_PLACES=290, PETRI_TRANSITIONS=329} [2024-06-21 15:44:34,657 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-21 15:44:34,657 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 329 transitions, 3770 flow [2024-06-21 15:44:34,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:34,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:34,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:34,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:44:34,657 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:34,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash -558375965, now seen corresponding path program 6 times [2024-06-21 15:44:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:34,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356800783] [2024-06-21 15:44:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:34,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:34,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356800783] [2024-06-21 15:44:34,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356800783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:34,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:34,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:34,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425036994] [2024-06-21 15:44:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:34,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:34,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:34,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 329 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:34,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:34,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:34,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:35,324 INFO L124 PetriNetUnfolderBase]: 1769/2990 cut-off events. [2024-06-21 15:44:35,324 INFO L125 PetriNetUnfolderBase]: For 141854/141866 co-relation queries the response was YES. [2024-06-21 15:44:35,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18859 conditions, 2990 events. 1769/2990 cut-off events. For 141854/141866 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17918 event pairs, 380 based on Foata normal form. 13/3002 useless extension candidates. Maximal degree in co-relation 18727. Up to 2550 conditions per place. [2024-06-21 15:44:35,358 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 110 changer transitions 0/353 dead transitions. [2024-06-21 15:44:35,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 353 transitions, 4654 flow [2024-06-21 15:44:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:44:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:44:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-21 15:44:35,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-06-21 15:44:35,359 INFO L175 Difference]: Start difference. First operand has 290 places, 329 transitions, 3770 flow. Second operand 13 states and 274 transitions. [2024-06-21 15:44:35,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 353 transitions, 4654 flow [2024-06-21 15:44:35,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 353 transitions, 4346 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:35,944 INFO L231 Difference]: Finished difference. Result has 291 places, 329 transitions, 3688 flow [2024-06-21 15:44:35,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3688, PETRI_PLACES=291, PETRI_TRANSITIONS=329} [2024-06-21 15:44:35,945 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-21 15:44:35,945 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 329 transitions, 3688 flow [2024-06-21 15:44:35,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:35,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:35,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:35,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:44:35,945 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:35,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:35,945 INFO L85 PathProgramCache]: Analyzing trace with hash -401079187, now seen corresponding path program 7 times [2024-06-21 15:44:35,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:35,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917110248] [2024-06-21 15:44:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:35,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:36,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917110248] [2024-06-21 15:44:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917110248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:36,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954622876] [2024-06-21 15:44:36,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:36,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:36,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 329 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:36,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:36,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:36,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:36,558 INFO L124 PetriNetUnfolderBase]: 1782/3011 cut-off events. [2024-06-21 15:44:36,558 INFO L125 PetriNetUnfolderBase]: For 148127/148135 co-relation queries the response was YES. [2024-06-21 15:44:36,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 3011 events. 1782/3011 cut-off events. For 148127/148135 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18067 event pairs, 397 based on Foata normal form. 9/3018 useless extension candidates. Maximal degree in co-relation 18793. Up to 2491 conditions per place. [2024-06-21 15:44:36,588 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 116 changer transitions 0/358 dead transitions. [2024-06-21 15:44:36,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 358 transitions, 4806 flow [2024-06-21 15:44:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:44:36,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 15:44:36,589 INFO L175 Difference]: Start difference. First operand has 291 places, 329 transitions, 3688 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:44:36,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 358 transitions, 4806 flow [2024-06-21 15:44:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 358 transitions, 4586 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:37,169 INFO L231 Difference]: Finished difference. Result has 287 places, 335 transitions, 3790 flow [2024-06-21 15:44:37,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3790, PETRI_PLACES=287, PETRI_TRANSITIONS=335} [2024-06-21 15:44:37,170 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 15:44:37,170 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 335 transitions, 3790 flow [2024-06-21 15:44:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:37,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:37,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:37,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 15:44:37,171 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:37,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash -397354537, now seen corresponding path program 8 times [2024-06-21 15:44:37,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:37,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340439127] [2024-06-21 15:44:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:37,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:37,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:37,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:37,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340439127] [2024-06-21 15:44:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340439127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:37,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:37,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555336821] [2024-06-21 15:44:37,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:37,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:37,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:37,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:37,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 335 transitions, 3790 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:37,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:37,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:37,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:37,833 INFO L124 PetriNetUnfolderBase]: 1787/3021 cut-off events. [2024-06-21 15:44:37,834 INFO L125 PetriNetUnfolderBase]: For 152287/152299 co-relation queries the response was YES. [2024-06-21 15:44:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19080 conditions, 3021 events. 1787/3021 cut-off events. For 152287/152299 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 18131 event pairs, 380 based on Foata normal form. 13/3033 useless extension candidates. Maximal degree in co-relation 18947. Up to 2631 conditions per place. [2024-06-21 15:44:37,868 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 66 changer transitions 0/359 dead transitions. [2024-06-21 15:44:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 359 transitions, 4730 flow [2024-06-21 15:44:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 15:44:37,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-21 15:44:37,869 INFO L175 Difference]: Start difference. First operand has 287 places, 335 transitions, 3790 flow. Second operand 10 states and 218 transitions. [2024-06-21 15:44:37,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 359 transitions, 4730 flow [2024-06-21 15:44:38,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 359 transitions, 4530 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 15:44:38,477 INFO L231 Difference]: Finished difference. Result has 293 places, 338 transitions, 3774 flow [2024-06-21 15:44:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3774, PETRI_PLACES=293, PETRI_TRANSITIONS=338} [2024-06-21 15:44:38,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 15:44:38,477 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 338 transitions, 3774 flow [2024-06-21 15:44:38,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:38,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:38,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:38,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 15:44:38,478 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:38,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -234845407, now seen corresponding path program 9 times [2024-06-21 15:44:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:38,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467538746] [2024-06-21 15:44:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:38,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467538746] [2024-06-21 15:44:38,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467538746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:38,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:38,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226094965] [2024-06-21 15:44:38,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:38,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:38,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:38,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:38,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 338 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:38,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:38,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:38,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:39,122 INFO L124 PetriNetUnfolderBase]: 1792/3030 cut-off events. [2024-06-21 15:44:39,122 INFO L125 PetriNetUnfolderBase]: For 156272/156284 co-relation queries the response was YES. [2024-06-21 15:44:39,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19066 conditions, 3030 events. 1792/3030 cut-off events. For 156272/156284 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18230 event pairs, 380 based on Foata normal form. 13/3042 useless extension candidates. Maximal degree in co-relation 18932. Up to 2503 conditions per place. [2024-06-21 15:44:39,154 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 128 changer transitions 0/373 dead transitions. [2024-06-21 15:44:39,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 373 transitions, 4907 flow [2024-06-21 15:44:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:44:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:44:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-21 15:44:39,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-21 15:44:39,155 INFO L175 Difference]: Start difference. First operand has 293 places, 338 transitions, 3774 flow. Second operand 11 states and 251 transitions. [2024-06-21 15:44:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 373 transitions, 4907 flow [2024-06-21 15:44:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 373 transitions, 4723 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:39,832 INFO L231 Difference]: Finished difference. Result has 295 places, 341 transitions, 3891 flow [2024-06-21 15:44:39,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3891, PETRI_PLACES=295, PETRI_TRANSITIONS=341} [2024-06-21 15:44:39,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-21 15:44:39,832 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 341 transitions, 3891 flow [2024-06-21 15:44:39,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:39,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:39,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:39,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 15:44:39,833 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:39,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash -397360117, now seen corresponding path program 10 times [2024-06-21 15:44:39,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:39,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851994608] [2024-06-21 15:44:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:39,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:39,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851994608] [2024-06-21 15:44:39,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851994608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:39,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:39,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067175573] [2024-06-21 15:44:39,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:39,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:39,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 341 transitions, 3891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:39,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:39,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:39,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:40,452 INFO L124 PetriNetUnfolderBase]: 1789/3026 cut-off events. [2024-06-21 15:44:40,452 INFO L125 PetriNetUnfolderBase]: For 157959/157971 co-relation queries the response was YES. [2024-06-21 15:44:40,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19153 conditions, 3026 events. 1789/3026 cut-off events. For 157959/157971 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18213 event pairs, 380 based on Foata normal form. 13/3038 useless extension candidates. Maximal degree in co-relation 19018. Up to 2635 conditions per place. [2024-06-21 15:44:40,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 64 changer transitions 0/359 dead transitions. [2024-06-21 15:44:40,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 359 transitions, 4639 flow [2024-06-21 15:44:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 15:44:40,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 15:44:40,488 INFO L175 Difference]: Start difference. First operand has 295 places, 341 transitions, 3891 flow. Second operand 8 states and 182 transitions. [2024-06-21 15:44:40,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 359 transitions, 4639 flow [2024-06-21 15:44:41,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 359 transitions, 4299 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:41,157 INFO L231 Difference]: Finished difference. Result has 294 places, 341 transitions, 3685 flow [2024-06-21 15:44:41,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=294, PETRI_TRANSITIONS=341} [2024-06-21 15:44:41,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-21 15:44:41,158 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 341 transitions, 3685 flow [2024-06-21 15:44:41,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:41,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:41,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:41,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 15:44:41,158 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:41,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash -225590977, now seen corresponding path program 11 times [2024-06-21 15:44:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:41,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817313600] [2024-06-21 15:44:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817313600] [2024-06-21 15:44:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817313600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:41,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:41,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923014847] [2024-06-21 15:44:41,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:41,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:41,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:41,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 341 transitions, 3685 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:41,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:41,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:41,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:41,840 INFO L124 PetriNetUnfolderBase]: 1802/3048 cut-off events. [2024-06-21 15:44:41,840 INFO L125 PetriNetUnfolderBase]: For 163498/163510 co-relation queries the response was YES. [2024-06-21 15:44:41,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19150 conditions, 3048 events. 1802/3048 cut-off events. For 163498/163510 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18376 event pairs, 380 based on Foata normal form. 13/3060 useless extension candidates. Maximal degree in co-relation 19014. Up to 2515 conditions per place. [2024-06-21 15:44:41,872 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 138 changer transitions 0/378 dead transitions. [2024-06-21 15:44:41,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 378 transitions, 4855 flow [2024-06-21 15:44:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:44:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:44:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-21 15:44:41,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:44:41,873 INFO L175 Difference]: Start difference. First operand has 294 places, 341 transitions, 3685 flow. Second operand 13 states and 286 transitions. [2024-06-21 15:44:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 378 transitions, 4855 flow [2024-06-21 15:44:42,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 378 transitions, 4727 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:42,559 INFO L231 Difference]: Finished difference. Result has 300 places, 347 transitions, 3901 flow [2024-06-21 15:44:42,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3901, PETRI_PLACES=300, PETRI_TRANSITIONS=347} [2024-06-21 15:44:42,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 15:44:42,560 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 347 transitions, 3901 flow [2024-06-21 15:44:42,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:42,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:42,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:42,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 15:44:42,561 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:42,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash -225579817, now seen corresponding path program 12 times [2024-06-21 15:44:42,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:42,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825172080] [2024-06-21 15:44:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:42,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825172080] [2024-06-21 15:44:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825172080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:42,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:42,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652234439] [2024-06-21 15:44:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:42,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:42,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:42,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:42,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:42,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 347 transitions, 3901 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:42,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:42,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:42,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:43,212 INFO L124 PetriNetUnfolderBase]: 1799/3044 cut-off events. [2024-06-21 15:44:43,212 INFO L125 PetriNetUnfolderBase]: For 165307/165319 co-relation queries the response was YES. [2024-06-21 15:44:43,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 3044 events. 1799/3044 cut-off events. For 165307/165319 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18326 event pairs, 380 based on Foata normal form. 13/3056 useless extension candidates. Maximal degree in co-relation 19163. Up to 2512 conditions per place. [2024-06-21 15:44:43,248 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 140 changer transitions 0/377 dead transitions. [2024-06-21 15:44:43,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 377 transitions, 4861 flow [2024-06-21 15:44:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:44:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:44:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 283 transitions. [2024-06-21 15:44:43,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5442307692307692 [2024-06-21 15:44:43,249 INFO L175 Difference]: Start difference. First operand has 300 places, 347 transitions, 3901 flow. Second operand 13 states and 283 transitions. [2024-06-21 15:44:43,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 377 transitions, 4861 flow [2024-06-21 15:44:43,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 377 transitions, 4602 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 15:44:43,956 INFO L231 Difference]: Finished difference. Result has 304 places, 347 transitions, 3928 flow [2024-06-21 15:44:43,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3928, PETRI_PLACES=304, PETRI_TRANSITIONS=347} [2024-06-21 15:44:43,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 15:44:43,956 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 347 transitions, 3928 flow [2024-06-21 15:44:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:43,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:43,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:43,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 15:44:43,957 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:43,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2045214539, now seen corresponding path program 13 times [2024-06-21 15:44:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:43,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820032874] [2024-06-21 15:44:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:43,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:44,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:44,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820032874] [2024-06-21 15:44:44,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820032874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:44,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:44,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:44,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495702588] [2024-06-21 15:44:44,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:44,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:44,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:44,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:44,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:44,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:44,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 347 transitions, 3928 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:44,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:44,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:44,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:44,670 INFO L124 PetriNetUnfolderBase]: 1828/3096 cut-off events. [2024-06-21 15:44:44,670 INFO L125 PetriNetUnfolderBase]: For 172760/172772 co-relation queries the response was YES. [2024-06-21 15:44:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19736 conditions, 3096 events. 1828/3096 cut-off events. For 172760/172772 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18701 event pairs, 380 based on Foata normal form. 13/3108 useless extension candidates. Maximal degree in co-relation 19598. Up to 2613 conditions per place. [2024-06-21 15:44:44,707 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 103 changer transitions 0/389 dead transitions. [2024-06-21 15:44:44,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 389 transitions, 5231 flow [2024-06-21 15:44:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:44:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:44:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 15:44:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-21 15:44:44,709 INFO L175 Difference]: Start difference. First operand has 304 places, 347 transitions, 3928 flow. Second operand 9 states and 215 transitions. [2024-06-21 15:44:44,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 389 transitions, 5231 flow [2024-06-21 15:44:45,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 4925 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:45,507 INFO L231 Difference]: Finished difference. Result has 302 places, 358 transitions, 4025 flow [2024-06-21 15:44:45,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4025, PETRI_PLACES=302, PETRI_TRANSITIONS=358} [2024-06-21 15:44:45,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 15:44:45,508 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 358 transitions, 4025 flow [2024-06-21 15:44:45,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:45,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:45,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:45,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 15:44:45,508 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:45,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2045220119, now seen corresponding path program 14 times [2024-06-21 15:44:45,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:45,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825967466] [2024-06-21 15:44:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825967466] [2024-06-21 15:44:45,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825967466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:45,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:45,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:45,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025989502] [2024-06-21 15:44:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:45,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 358 transitions, 4025 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:46,182 INFO L124 PetriNetUnfolderBase]: 1841/3118 cut-off events. [2024-06-21 15:44:46,182 INFO L125 PetriNetUnfolderBase]: For 179939/179951 co-relation queries the response was YES. [2024-06-21 15:44:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19948 conditions, 3118 events. 1841/3118 cut-off events. For 179939/179951 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18870 event pairs, 380 based on Foata normal form. 13/3130 useless extension candidates. Maximal degree in co-relation 19808. Up to 2628 conditions per place. [2024-06-21 15:44:46,220 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 114 changer transitions 0/393 dead transitions. [2024-06-21 15:44:46,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 393 transitions, 5264 flow [2024-06-21 15:44:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 15:44:46,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-21 15:44:46,221 INFO L175 Difference]: Start difference. First operand has 302 places, 358 transitions, 4025 flow. Second operand 10 states and 229 transitions. [2024-06-21 15:44:46,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 393 transitions, 5264 flow [2024-06-21 15:44:47,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 393 transitions, 5039 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:47,022 INFO L231 Difference]: Finished difference. Result has 306 places, 365 transitions, 4168 flow [2024-06-21 15:44:47,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4168, PETRI_PLACES=306, PETRI_TRANSITIONS=365} [2024-06-21 15:44:47,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 15:44:47,023 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 365 transitions, 4168 flow [2024-06-21 15:44:47,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:47,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:47,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:47,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 15:44:47,023 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:47,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:47,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2045398679, now seen corresponding path program 15 times [2024-06-21 15:44:47,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:47,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998691720] [2024-06-21 15:44:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:47,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:47,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998691720] [2024-06-21 15:44:47,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998691720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:47,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:47,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:47,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039480671] [2024-06-21 15:44:47,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:47,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:47,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:47,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:47,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 365 transitions, 4168 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:47,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:47,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:47,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:47,710 INFO L124 PetriNetUnfolderBase]: 1846/3127 cut-off events. [2024-06-21 15:44:47,711 INFO L125 PetriNetUnfolderBase]: For 180056/180068 co-relation queries the response was YES. [2024-06-21 15:44:47,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 3127 events. 1846/3127 cut-off events. For 180056/180068 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18942 event pairs, 380 based on Foata normal form. 13/3139 useless extension candidates. Maximal degree in co-relation 19941. Up to 2634 conditions per place. [2024-06-21 15:44:47,744 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 112 changer transitions 0/391 dead transitions. [2024-06-21 15:44:47,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 391 transitions, 5345 flow [2024-06-21 15:44:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 15:44:47,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 15:44:47,745 INFO L175 Difference]: Start difference. First operand has 306 places, 365 transitions, 4168 flow. Second operand 8 states and 190 transitions. [2024-06-21 15:44:47,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 391 transitions, 5345 flow [2024-06-21 15:44:48,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 391 transitions, 5131 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:48,600 INFO L231 Difference]: Finished difference. Result has 307 places, 368 transitions, 4237 flow [2024-06-21 15:44:48,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=307, PETRI_TRANSITIONS=368} [2024-06-21 15:44:48,601 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 15:44:48,601 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 368 transitions, 4237 flow [2024-06-21 15:44:48,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:48,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:48,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:48,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 15:44:48,602 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:48,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2045571659, now seen corresponding path program 16 times [2024-06-21 15:44:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:48,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327482695] [2024-06-21 15:44:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327482695] [2024-06-21 15:44:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327482695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:48,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508492973] [2024-06-21 15:44:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:48,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:48,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 368 transitions, 4237 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:48,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:48,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:48,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:49,285 INFO L124 PetriNetUnfolderBase]: 1843/3123 cut-off events. [2024-06-21 15:44:49,285 INFO L125 PetriNetUnfolderBase]: For 177398/177410 co-relation queries the response was YES. [2024-06-21 15:44:49,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19972 conditions, 3123 events. 1843/3123 cut-off events. For 177398/177410 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18916 event pairs, 380 based on Foata normal form. 13/3135 useless extension candidates. Maximal degree in co-relation 19831. Up to 2631 conditions per place. [2024-06-21 15:44:49,322 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 270 selfloop transitions, 116 changer transitions 0/393 dead transitions. [2024-06-21 15:44:49,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 393 transitions, 5373 flow [2024-06-21 15:44:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 15:44:49,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-21 15:44:49,323 INFO L175 Difference]: Start difference. First operand has 307 places, 368 transitions, 4237 flow. Second operand 10 states and 227 transitions. [2024-06-21 15:44:49,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 393 transitions, 5373 flow [2024-06-21 15:44:50,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 393 transitions, 5190 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:44:50,124 INFO L231 Difference]: Finished difference. Result has 312 places, 368 transitions, 4292 flow [2024-06-21 15:44:50,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4292, PETRI_PLACES=312, PETRI_TRANSITIONS=368} [2024-06-21 15:44:50,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-21 15:44:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 368 transitions, 4292 flow [2024-06-21 15:44:50,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:50,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:50,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 15:44:50,125 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:50,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2045566079, now seen corresponding path program 17 times [2024-06-21 15:44:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:50,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389003345] [2024-06-21 15:44:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:50,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:50,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:50,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389003345] [2024-06-21 15:44:50,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389003345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:50,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:50,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720366602] [2024-06-21 15:44:50,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:50,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:50,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:50,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 368 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:50,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:50,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:50,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:50,857 INFO L124 PetriNetUnfolderBase]: 1840/3119 cut-off events. [2024-06-21 15:44:50,857 INFO L125 PetriNetUnfolderBase]: For 178947/178959 co-relation queries the response was YES. [2024-06-21 15:44:50,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19959 conditions, 3119 events. 1840/3119 cut-off events. For 178947/178959 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18878 event pairs, 380 based on Foata normal form. 13/3131 useless extension candidates. Maximal degree in co-relation 19817. Up to 2628 conditions per place. [2024-06-21 15:44:50,888 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 117 changer transitions 0/393 dead transitions. [2024-06-21 15:44:50,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 393 transitions, 5278 flow [2024-06-21 15:44:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:44:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:44:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-21 15:44:50,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-21 15:44:50,891 INFO L175 Difference]: Start difference. First operand has 312 places, 368 transitions, 4292 flow. Second operand 11 states and 243 transitions. [2024-06-21 15:44:50,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 393 transitions, 5278 flow [2024-06-21 15:44:51,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 393 transitions, 5016 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:51,733 INFO L231 Difference]: Finished difference. Result has 316 places, 368 transitions, 4270 flow [2024-06-21 15:44:51,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4270, PETRI_PLACES=316, PETRI_TRANSITIONS=368} [2024-06-21 15:44:51,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-21 15:44:51,734 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 368 transitions, 4270 flow [2024-06-21 15:44:51,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:51,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:51,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 15:44:51,734 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:51,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2045387519, now seen corresponding path program 18 times [2024-06-21 15:44:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801004646] [2024-06-21 15:44:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:51,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:51,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:51,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801004646] [2024-06-21 15:44:51,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801004646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:51,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:51,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278232206] [2024-06-21 15:44:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:51,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 368 transitions, 4270 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:51,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:51,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:51,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:52,419 INFO L124 PetriNetUnfolderBase]: 1837/3115 cut-off events. [2024-06-21 15:44:52,419 INFO L125 PetriNetUnfolderBase]: For 179929/179941 co-relation queries the response was YES. [2024-06-21 15:44:52,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19889 conditions, 3115 events. 1837/3115 cut-off events. For 179929/179941 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18848 event pairs, 380 based on Foata normal form. 13/3127 useless extension candidates. Maximal degree in co-relation 19746. Up to 2625 conditions per place. [2024-06-21 15:44:52,457 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 274 selfloop transitions, 111 changer transitions 0/392 dead transitions. [2024-06-21 15:44:52,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 392 transitions, 5100 flow [2024-06-21 15:44:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:44:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:44:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:44:52,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 15:44:52,458 INFO L175 Difference]: Start difference. First operand has 316 places, 368 transitions, 4270 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:44:52,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 392 transitions, 5100 flow [2024-06-21 15:44:53,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 392 transitions, 4810 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 15:44:53,293 INFO L231 Difference]: Finished difference. Result has 313 places, 368 transitions, 4208 flow [2024-06-21 15:44:53,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4208, PETRI_PLACES=313, PETRI_TRANSITIONS=368} [2024-06-21 15:44:53,294 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-21 15:44:53,294 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 368 transitions, 4208 flow [2024-06-21 15:44:53,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:53,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:53,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:53,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 15:44:53,294 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:53,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1475184831, now seen corresponding path program 19 times [2024-06-21 15:44:53,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:53,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905680001] [2024-06-21 15:44:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:53,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905680001] [2024-06-21 15:44:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905680001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:53,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:53,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:53,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104549002] [2024-06-21 15:44:53,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:53,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:53,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 368 transitions, 4208 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:53,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:53,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:53,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:53,933 INFO L124 PetriNetUnfolderBase]: 1842/3121 cut-off events. [2024-06-21 15:44:53,933 INFO L125 PetriNetUnfolderBase]: For 184087/184095 co-relation queries the response was YES. [2024-06-21 15:44:53,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19942 conditions, 3121 events. 1842/3121 cut-off events. For 184087/184095 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 18924 event pairs, 402 based on Foata normal form. 6/3125 useless extension candidates. Maximal degree in co-relation 19798. Up to 2552 conditions per place. [2024-06-21 15:44:53,972 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 170 changer transitions 0/389 dead transitions. [2024-06-21 15:44:53,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 389 transitions, 5206 flow [2024-06-21 15:44:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:44:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:44:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 15:44:53,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-21 15:44:53,973 INFO L175 Difference]: Start difference. First operand has 313 places, 368 transitions, 4208 flow. Second operand 10 states and 218 transitions. [2024-06-21 15:44:53,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 389 transitions, 5206 flow [2024-06-21 15:44:54,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 4942 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:44:54,924 INFO L231 Difference]: Finished difference. Result has 315 places, 371 transitions, 4324 flow [2024-06-21 15:44:54,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4324, PETRI_PLACES=315, PETRI_TRANSITIONS=371} [2024-06-21 15:44:54,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-21 15:44:54,925 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 371 transitions, 4324 flow [2024-06-21 15:44:54,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:54,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:54,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:54,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 15:44:54,926 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:54,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1135365621, now seen corresponding path program 20 times [2024-06-21 15:44:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672746467] [2024-06-21 15:44:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:54,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:55,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672746467] [2024-06-21 15:44:55,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672746467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:55,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:55,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:55,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762490778] [2024-06-21 15:44:55,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:55,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:55,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:55,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:55,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:55,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 371 transitions, 4324 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:55,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:55,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:55,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:55,625 INFO L124 PetriNetUnfolderBase]: 1855/3146 cut-off events. [2024-06-21 15:44:55,625 INFO L125 PetriNetUnfolderBase]: For 191323/191335 co-relation queries the response was YES. [2024-06-21 15:44:55,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 3146 events. 1855/3146 cut-off events. For 191323/191335 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19093 event pairs, 380 based on Foata normal form. 13/3158 useless extension candidates. Maximal degree in co-relation 20157. Up to 2567 conditions per place. [2024-06-21 15:44:55,662 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 182 changer transitions 0/415 dead transitions. [2024-06-21 15:44:55,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 415 transitions, 5632 flow [2024-06-21 15:44:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:44:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:44:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-21 15:44:55,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2024-06-21 15:44:55,663 INFO L175 Difference]: Start difference. First operand has 315 places, 371 transitions, 4324 flow. Second operand 14 states and 309 transitions. [2024-06-21 15:44:55,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 415 transitions, 5632 flow [2024-06-21 15:44:56,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 415 transitions, 5330 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 15:44:56,644 INFO L231 Difference]: Finished difference. Result has 322 places, 377 transitions, 4480 flow [2024-06-21 15:44:56,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4480, PETRI_PLACES=322, PETRI_TRANSITIONS=377} [2024-06-21 15:44:56,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 15:44:56,645 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 377 transitions, 4480 flow [2024-06-21 15:44:56,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:56,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:56,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:56,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 15:44:56,645 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:56,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1142717271, now seen corresponding path program 21 times [2024-06-21 15:44:56,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:56,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314335857] [2024-06-21 15:44:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:56,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:56,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:56,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314335857] [2024-06-21 15:44:56,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314335857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:56,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:56,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716576151] [2024-06-21 15:44:56,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:56,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:56,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 377 transitions, 4480 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:56,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:56,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:56,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:57,343 INFO L124 PetriNetUnfolderBase]: 1852/3142 cut-off events. [2024-06-21 15:44:57,343 INFO L125 PetriNetUnfolderBase]: For 192629/192641 co-relation queries the response was YES. [2024-06-21 15:44:57,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20310 conditions, 3142 events. 1852/3142 cut-off events. For 192629/192641 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19097 event pairs, 380 based on Foata normal form. 13/3154 useless extension candidates. Maximal degree in co-relation 20164. Up to 2564 conditions per place. [2024-06-21 15:44:57,381 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 181 changer transitions 0/406 dead transitions. [2024-06-21 15:44:57,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 406 transitions, 5510 flow [2024-06-21 15:44:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:44:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:44:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-21 15:44:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:44:57,382 INFO L175 Difference]: Start difference. First operand has 322 places, 377 transitions, 4480 flow. Second operand 12 states and 264 transitions. [2024-06-21 15:44:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 406 transitions, 5510 flow [2024-06-21 15:44:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 5150 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-21 15:44:58,371 INFO L231 Difference]: Finished difference. Result has 322 places, 377 transitions, 4496 flow [2024-06-21 15:44:58,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4496, PETRI_PLACES=322, PETRI_TRANSITIONS=377} [2024-06-21 15:44:58,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 15:44:58,371 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 377 transitions, 4496 flow [2024-06-21 15:44:58,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:58,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:58,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:58,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 15:44:58,372 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:58,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1135360041, now seen corresponding path program 22 times [2024-06-21 15:44:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818914391] [2024-06-21 15:44:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:44:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:44:58,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:44:58,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818914391] [2024-06-21 15:44:58,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818914391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:44:58,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:44:58,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:44:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102114766] [2024-06-21 15:44:58,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:44:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:44:58,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:44:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:44:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:44:58,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:44:58,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 377 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:58,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:44:58,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:44:58,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:44:59,039 INFO L124 PetriNetUnfolderBase]: 1849/3138 cut-off events. [2024-06-21 15:44:59,040 INFO L125 PetriNetUnfolderBase]: For 185259/185271 co-relation queries the response was YES. [2024-06-21 15:44:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20143 conditions, 3138 events. 1849/3138 cut-off events. For 185259/185271 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19045 event pairs, 380 based on Foata normal form. 13/3150 useless extension candidates. Maximal degree in co-relation 19998. Up to 2561 conditions per place. [2024-06-21 15:44:59,076 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 182 changer transitions 0/411 dead transitions. [2024-06-21 15:44:59,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 411 transitions, 5388 flow [2024-06-21 15:44:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:44:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:44:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 271 transitions. [2024-06-21 15:44:59,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645833333333333 [2024-06-21 15:44:59,077 INFO L175 Difference]: Start difference. First operand has 322 places, 377 transitions, 4496 flow. Second operand 12 states and 271 transitions. [2024-06-21 15:44:59,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 411 transitions, 5388 flow [2024-06-21 15:44:59,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 411 transitions, 4880 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-21 15:44:59,957 INFO L231 Difference]: Finished difference. Result has 320 places, 377 transitions, 4366 flow [2024-06-21 15:44:59,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4366, PETRI_PLACES=320, PETRI_TRANSITIONS=377} [2024-06-21 15:44:59,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 15:44:59,957 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 377 transitions, 4366 flow [2024-06-21 15:44:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:44:59,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:44:59,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:44:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 15:44:59,958 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:44:59,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:44:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1420374067, now seen corresponding path program 23 times [2024-06-21 15:44:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:44:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658193765] [2024-06-21 15:44:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:44:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:44:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:00,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:00,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658193765] [2024-06-21 15:45:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658193765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:00,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:00,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066662198] [2024-06-21 15:45:00,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:00,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:00,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:00,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 377 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:00,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:00,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:00,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:00,629 INFO L124 PetriNetUnfolderBase]: 1862/3160 cut-off events. [2024-06-21 15:45:00,629 INFO L125 PetriNetUnfolderBase]: For 188453/188465 co-relation queries the response was YES. [2024-06-21 15:45:00,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20324 conditions, 3160 events. 1862/3160 cut-off events. For 188453/188465 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 19203 event pairs, 386 based on Foata normal form. 13/3172 useless extension candidates. Maximal degree in co-relation 20179. Up to 2549 conditions per place. [2024-06-21 15:45:00,667 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 178 changer transitions 0/412 dead transitions. [2024-06-21 15:45:00,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 5518 flow [2024-06-21 15:45:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-21 15:45:00,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:45:00,668 INFO L175 Difference]: Start difference. First operand has 320 places, 377 transitions, 4366 flow. Second operand 12 states and 264 transitions. [2024-06-21 15:45:00,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 5518 flow [2024-06-21 15:45:01,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 412 transitions, 5138 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 15:45:01,624 INFO L231 Difference]: Finished difference. Result has 319 places, 383 transitions, 4470 flow [2024-06-21 15:45:01,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4470, PETRI_PLACES=319, PETRI_TRANSITIONS=383} [2024-06-21 15:45:01,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-21 15:45:01,624 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 383 transitions, 4470 flow [2024-06-21 15:45:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:01,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:01,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:01,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 15:45:01,625 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:01,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash -973830741, now seen corresponding path program 24 times [2024-06-21 15:45:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:01,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991858944] [2024-06-21 15:45:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:01,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:01,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:01,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991858944] [2024-06-21 15:45:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991858944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:01,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:01,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885928296] [2024-06-21 15:45:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:01,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:01,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:01,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 383 transitions, 4470 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:01,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:01,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:01,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:02,394 INFO L124 PetriNetUnfolderBase]: 1867/3169 cut-off events. [2024-06-21 15:45:02,394 INFO L125 PetriNetUnfolderBase]: For 186773/186785 co-relation queries the response was YES. [2024-06-21 15:45:02,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20620 conditions, 3169 events. 1867/3169 cut-off events. For 186773/186785 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19298 event pairs, 380 based on Foata normal form. 13/3181 useless extension candidates. Maximal degree in co-relation 20476. Up to 2703 conditions per place. [2024-06-21 15:45:02,432 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 72 changer transitions 0/411 dead transitions. [2024-06-21 15:45:02,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 411 transitions, 5544 flow [2024-06-21 15:45:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 15:45:02,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-21 15:45:02,433 INFO L175 Difference]: Start difference. First operand has 319 places, 383 transitions, 4470 flow. Second operand 8 states and 189 transitions. [2024-06-21 15:45:02,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 411 transitions, 5544 flow [2024-06-21 15:45:03,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 5317 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:03,313 INFO L231 Difference]: Finished difference. Result has 319 places, 386 transitions, 4439 flow [2024-06-21 15:45:03,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4439, PETRI_PLACES=319, PETRI_TRANSITIONS=386} [2024-06-21 15:45:03,313 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-21 15:45:03,314 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 386 transitions, 4439 flow [2024-06-21 15:45:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:03,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:03,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:03,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 15:45:03,314 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:03,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 110840191, now seen corresponding path program 25 times [2024-06-21 15:45:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370252270] [2024-06-21 15:45:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:03,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:03,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370252270] [2024-06-21 15:45:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370252270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:03,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713768847] [2024-06-21 15:45:03,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:03,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:03,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 386 transitions, 4439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:03,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:03,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:03,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:04,033 INFO L124 PetriNetUnfolderBase]: 1864/3165 cut-off events. [2024-06-21 15:45:04,033 INFO L125 PetriNetUnfolderBase]: For 187348/187360 co-relation queries the response was YES. [2024-06-21 15:45:04,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 3165 events. 1864/3165 cut-off events. For 187348/187360 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19251 event pairs, 380 based on Foata normal form. 13/3177 useless extension candidates. Maximal degree in co-relation 20481. Up to 2700 conditions per place. [2024-06-21 15:45:04,072 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 74 changer transitions 0/415 dead transitions. [2024-06-21 15:45:04,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 415 transitions, 5327 flow [2024-06-21 15:45:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-21 15:45:04,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-21 15:45:04,073 INFO L175 Difference]: Start difference. First operand has 319 places, 386 transitions, 4439 flow. Second operand 10 states and 226 transitions. [2024-06-21 15:45:04,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 415 transitions, 5327 flow [2024-06-21 15:45:05,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 415 transitions, 5100 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:05,051 INFO L231 Difference]: Finished difference. Result has 323 places, 386 transitions, 4366 flow [2024-06-21 15:45:05,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4366, PETRI_PLACES=323, PETRI_TRANSITIONS=386} [2024-06-21 15:45:05,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-21 15:45:05,051 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 386 transitions, 4366 flow [2024-06-21 15:45:05,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:05,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 15:45:05,052 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:05,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 123738361, now seen corresponding path program 26 times [2024-06-21 15:45:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273234582] [2024-06-21 15:45:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273234582] [2024-06-21 15:45:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273234582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:05,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:05,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192645583] [2024-06-21 15:45:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:05,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:05,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 386 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:05,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:05,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:05,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:05,728 INFO L124 PetriNetUnfolderBase]: 1869/3174 cut-off events. [2024-06-21 15:45:05,728 INFO L125 PetriNetUnfolderBase]: For 191313/191325 co-relation queries the response was YES. [2024-06-21 15:45:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20600 conditions, 3174 events. 1869/3174 cut-off events. For 191313/191325 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19327 event pairs, 386 based on Foata normal form. 13/3186 useless extension candidates. Maximal degree in co-relation 20455. Up to 2603 conditions per place. [2024-06-21 15:45:05,763 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 259 selfloop transitions, 145 changer transitions 0/411 dead transitions. [2024-06-21 15:45:05,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 411 transitions, 5432 flow [2024-06-21 15:45:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:45:05,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:45:05,764 INFO L175 Difference]: Start difference. First operand has 323 places, 386 transitions, 4366 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:45:05,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 411 transitions, 5432 flow [2024-06-21 15:45:06,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 5101 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 15:45:06,633 INFO L231 Difference]: Finished difference. Result has 319 places, 389 transitions, 4373 flow [2024-06-21 15:45:06,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4373, PETRI_PLACES=319, PETRI_TRANSITIONS=389} [2024-06-21 15:45:06,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-21 15:45:06,634 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 389 transitions, 4373 flow [2024-06-21 15:45:06,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:06,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:06,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 15:45:06,634 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:06,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash 289972141, now seen corresponding path program 27 times [2024-06-21 15:45:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513595595] [2024-06-21 15:45:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:06,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:06,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513595595] [2024-06-21 15:45:06,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513595595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:06,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:06,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477865497] [2024-06-21 15:45:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:06,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:06,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 389 transitions, 4373 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:06,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:06,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:06,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:07,305 INFO L124 PetriNetUnfolderBase]: 1874/3183 cut-off events. [2024-06-21 15:45:07,305 INFO L125 PetriNetUnfolderBase]: For 195373/195385 co-relation queries the response was YES. [2024-06-21 15:45:07,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20759 conditions, 3183 events. 1874/3183 cut-off events. For 195373/195385 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19432 event pairs, 380 based on Foata normal form. 13/3195 useless extension candidates. Maximal degree in co-relation 20613. Up to 2609 conditions per place. [2024-06-21 15:45:07,345 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 156 changer transitions 0/417 dead transitions. [2024-06-21 15:45:07,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 5465 flow [2024-06-21 15:45:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-21 15:45:07,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-21 15:45:07,346 INFO L175 Difference]: Start difference. First operand has 319 places, 389 transitions, 4373 flow. Second operand 11 states and 244 transitions. [2024-06-21 15:45:07,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 5465 flow [2024-06-21 15:45:08,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 417 transitions, 5216 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:08,136 INFO L231 Difference]: Finished difference. Result has 325 places, 392 transitions, 4490 flow [2024-06-21 15:45:08,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4490, PETRI_PLACES=325, PETRI_TRANSITIONS=392} [2024-06-21 15:45:08,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 15:45:08,136 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 392 transitions, 4490 flow [2024-06-21 15:45:08,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:08,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 15:45:08,137 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:08,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash 282620491, now seen corresponding path program 28 times [2024-06-21 15:45:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:08,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599076512] [2024-06-21 15:45:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:08,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:08,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599076512] [2024-06-21 15:45:08,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599076512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:08,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:08,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:08,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633158954] [2024-06-21 15:45:08,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:08,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:08,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:08,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:08,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 392 transitions, 4490 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:08,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:08,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:08,828 INFO L124 PetriNetUnfolderBase]: 1879/3192 cut-off events. [2024-06-21 15:45:08,828 INFO L125 PetriNetUnfolderBase]: For 200284/200296 co-relation queries the response was YES. [2024-06-21 15:45:08,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 3192 events. 1879/3192 cut-off events. For 200284/200296 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19507 event pairs, 380 based on Foata normal form. 13/3204 useless extension candidates. Maximal degree in co-relation 20754. Up to 2615 conditions per place. [2024-06-21 15:45:08,867 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 162 changer transitions 0/422 dead transitions. [2024-06-21 15:45:08,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 422 transitions, 5601 flow [2024-06-21 15:45:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:45:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:45:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-21 15:45:08,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-21 15:45:08,868 INFO L175 Difference]: Start difference. First operand has 325 places, 392 transitions, 4490 flow. Second operand 13 states and 282 transitions. [2024-06-21 15:45:08,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 422 transitions, 5601 flow [2024-06-21 15:45:09,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 422 transitions, 5197 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:09,950 INFO L231 Difference]: Finished difference. Result has 329 places, 395 transitions, 4467 flow [2024-06-21 15:45:09,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4467, PETRI_PLACES=329, PETRI_TRANSITIONS=395} [2024-06-21 15:45:09,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 15:45:09,951 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 395 transitions, 4467 flow [2024-06-21 15:45:09,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:09,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:09,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:09,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 15:45:09,951 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:09,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 282614911, now seen corresponding path program 29 times [2024-06-21 15:45:09,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:09,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869866840] [2024-06-21 15:45:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:09,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:10,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:10,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869866840] [2024-06-21 15:45:10,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869866840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:10,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:10,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:10,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173444421] [2024-06-21 15:45:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:10,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:10,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 395 transitions, 4467 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:10,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:10,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:10,627 INFO L124 PetriNetUnfolderBase]: 1876/3188 cut-off events. [2024-06-21 15:45:10,627 INFO L125 PetriNetUnfolderBase]: For 200338/200350 co-relation queries the response was YES. [2024-06-21 15:45:10,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20786 conditions, 3188 events. 1876/3188 cut-off events. For 200338/200350 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19504 event pairs, 380 based on Foata normal form. 13/3200 useless extension candidates. Maximal degree in co-relation 20638. Up to 2612 conditions per place. [2024-06-21 15:45:10,667 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 164 changer transitions 0/421 dead transitions. [2024-06-21 15:45:10,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 421 transitions, 5357 flow [2024-06-21 15:45:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:45:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:45:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-21 15:45:10,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-21 15:45:10,668 INFO L175 Difference]: Start difference. First operand has 329 places, 395 transitions, 4467 flow. Second operand 13 states and 279 transitions. [2024-06-21 15:45:10,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 421 transitions, 5357 flow [2024-06-21 15:45:11,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 421 transitions, 4969 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-21 15:45:11,613 INFO L231 Difference]: Finished difference. Result has 331 places, 395 transitions, 4413 flow [2024-06-21 15:45:11,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4413, PETRI_PLACES=331, PETRI_TRANSITIONS=395} [2024-06-21 15:45:11,613 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-21 15:45:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 395 transitions, 4413 flow [2024-06-21 15:45:11,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:11,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:11,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:11,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 15:45:11,614 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:11,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash -18720449, now seen corresponding path program 30 times [2024-06-21 15:45:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:11,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382499208] [2024-06-21 15:45:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382499208] [2024-06-21 15:45:11,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382499208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:11,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:11,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129529244] [2024-06-21 15:45:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:11,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:11,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:11,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:11,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 395 transitions, 4413 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:11,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:11,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:11,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:12,268 INFO L124 PetriNetUnfolderBase]: 1873/3181 cut-off events. [2024-06-21 15:45:12,269 INFO L125 PetriNetUnfolderBase]: For 200954/200962 co-relation queries the response was YES. [2024-06-21 15:45:12,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20672 conditions, 3181 events. 1873/3181 cut-off events. For 200954/200962 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19415 event pairs, 402 based on Foata normal form. 6/3185 useless extension candidates. Maximal degree in co-relation 20523. Up to 2521 conditions per place. [2024-06-21 15:45:12,308 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 226 changer transitions 0/417 dead transitions. [2024-06-21 15:45:12,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 417 transitions, 5339 flow [2024-06-21 15:45:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-21 15:45:12,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-21 15:45:12,309 INFO L175 Difference]: Start difference. First operand has 331 places, 395 transitions, 4413 flow. Second operand 12 states and 254 transitions. [2024-06-21 15:45:12,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 417 transitions, 5339 flow [2024-06-21 15:45:13,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 417 transitions, 4931 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-21 15:45:13,217 INFO L231 Difference]: Finished difference. Result has 330 places, 398 transitions, 4531 flow [2024-06-21 15:45:13,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4531, PETRI_PLACES=330, PETRI_TRANSITIONS=398} [2024-06-21 15:45:13,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-21 15:45:13,217 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 398 transitions, 4531 flow [2024-06-21 15:45:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:13,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:13,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 15:45:13,218 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:13,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1473257326, now seen corresponding path program 1 times [2024-06-21 15:45:13,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:13,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062732288] [2024-06-21 15:45:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:13,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:13,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062732288] [2024-06-21 15:45:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062732288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:13,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:13,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:13,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357785693] [2024-06-21 15:45:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:13,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:13,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:13,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:13,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:13,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 4531 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:13,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:13,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:13,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:13,894 INFO L124 PetriNetUnfolderBase]: 1959/3315 cut-off events. [2024-06-21 15:45:13,895 INFO L125 PetriNetUnfolderBase]: For 272580/272588 co-relation queries the response was YES. [2024-06-21 15:45:13,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22952 conditions, 3315 events. 1959/3315 cut-off events. For 272580/272588 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20224 event pairs, 314 based on Foata normal form. 14/3321 useless extension candidates. Maximal degree in co-relation 22802. Up to 1909 conditions per place. [2024-06-21 15:45:13,934 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 333 selfloop transitions, 101 changer transitions 0/441 dead transitions. [2024-06-21 15:45:13,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 441 transitions, 5967 flow [2024-06-21 15:45:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:45:13,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 15:45:13,935 INFO L175 Difference]: Start difference. First operand has 330 places, 398 transitions, 4531 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:45:13,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 441 transitions, 5967 flow [2024-06-21 15:45:15,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 441 transitions, 5463 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 15:45:15,133 INFO L231 Difference]: Finished difference. Result has 328 places, 401 transitions, 4289 flow [2024-06-21 15:45:15,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4289, PETRI_PLACES=328, PETRI_TRANSITIONS=401} [2024-06-21 15:45:15,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-21 15:45:15,133 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 401 transitions, 4289 flow [2024-06-21 15:45:15,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:15,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:15,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:15,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 15:45:15,133 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:15,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871854, now seen corresponding path program 1 times [2024-06-21 15:45:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:15,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422130633] [2024-06-21 15:45:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422130633] [2024-06-21 15:45:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422130633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:15,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:15,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:15,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698529252] [2024-06-21 15:45:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:15,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:15,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:15,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 401 transitions, 4289 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:15,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:15,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:15,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:15,865 INFO L124 PetriNetUnfolderBase]: 2079/3518 cut-off events. [2024-06-21 15:45:15,865 INFO L125 PetriNetUnfolderBase]: For 337978/337990 co-relation queries the response was YES. [2024-06-21 15:45:15,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25613 conditions, 3518 events. 2079/3518 cut-off events. For 337978/337990 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 21760 event pairs, 337 based on Foata normal form. 18/3535 useless extension candidates. Maximal degree in co-relation 25462. Up to 2470 conditions per place. [2024-06-21 15:45:15,908 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 102 changer transitions 0/446 dead transitions. [2024-06-21 15:45:15,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 446 transitions, 5805 flow [2024-06-21 15:45:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 15:45:15,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-21 15:45:15,909 INFO L175 Difference]: Start difference. First operand has 328 places, 401 transitions, 4289 flow. Second operand 10 states and 233 transitions. [2024-06-21 15:45:15,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 446 transitions, 5805 flow [2024-06-21 15:45:17,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 446 transitions, 5682 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 15:45:17,283 INFO L231 Difference]: Finished difference. Result has 336 places, 406 transitions, 4469 flow [2024-06-21 15:45:17,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4469, PETRI_PLACES=336, PETRI_TRANSITIONS=406} [2024-06-21 15:45:17,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-21 15:45:17,283 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 406 transitions, 4469 flow [2024-06-21 15:45:17,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:17,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:17,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 15:45:17,284 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:17,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871668, now seen corresponding path program 2 times [2024-06-21 15:45:17,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:17,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523490556] [2024-06-21 15:45:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:17,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:17,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523490556] [2024-06-21 15:45:17,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523490556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:17,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:17,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:17,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786207486] [2024-06-21 15:45:17,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:17,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:17,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:17,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:17,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:17,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 406 transitions, 4469 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:17,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:17,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:17,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:18,087 INFO L124 PetriNetUnfolderBase]: 2099/3554 cut-off events. [2024-06-21 15:45:18,087 INFO L125 PetriNetUnfolderBase]: For 347734/347746 co-relation queries the response was YES. [2024-06-21 15:45:18,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26124 conditions, 3554 events. 2099/3554 cut-off events. For 347734/347746 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22071 event pairs, 313 based on Foata normal form. 18/3571 useless extension candidates. Maximal degree in co-relation 25970. Up to 2946 conditions per place. [2024-06-21 15:45:18,125 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 373 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-21 15:45:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 437 transitions, 5433 flow [2024-06-21 15:45:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:45:18,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 15:45:18,126 INFO L175 Difference]: Start difference. First operand has 336 places, 406 transitions, 4469 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:45:18,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 437 transitions, 5433 flow [2024-06-21 15:45:19,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 437 transitions, 5322 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 15:45:19,413 INFO L231 Difference]: Finished difference. Result has 340 places, 407 transitions, 4492 flow [2024-06-21 15:45:19,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4492, PETRI_PLACES=340, PETRI_TRANSITIONS=407} [2024-06-21 15:45:19,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-21 15:45:19,414 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 407 transitions, 4492 flow [2024-06-21 15:45:19,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:19,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:19,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:19,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 15:45:19,414 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:19,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1705003188, now seen corresponding path program 3 times [2024-06-21 15:45:19,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:19,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672657935] [2024-06-21 15:45:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:19,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:19,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672657935] [2024-06-21 15:45:19,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672657935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:19,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580645697] [2024-06-21 15:45:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:19,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:19,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:19,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:19,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 407 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:19,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:19,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:20,187 INFO L124 PetriNetUnfolderBase]: 2176/3681 cut-off events. [2024-06-21 15:45:20,188 INFO L125 PetriNetUnfolderBase]: For 379493/379505 co-relation queries the response was YES. [2024-06-21 15:45:20,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27550 conditions, 3681 events. 2176/3681 cut-off events. For 379493/379505 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 22991 event pairs, 318 based on Foata normal form. 18/3698 useless extension candidates. Maximal degree in co-relation 27394. Up to 2988 conditions per place. [2024-06-21 15:45:20,236 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 375 selfloop transitions, 65 changer transitions 0/447 dead transitions. [2024-06-21 15:45:20,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 5758 flow [2024-06-21 15:45:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 15:45:20,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 15:45:20,237 INFO L175 Difference]: Start difference. First operand has 340 places, 407 transitions, 4492 flow. Second operand 9 states and 203 transitions. [2024-06-21 15:45:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 5758 flow [2024-06-21 15:45:21,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 5620 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 15:45:21,476 INFO L231 Difference]: Finished difference. Result has 343 places, 415 transitions, 4595 flow [2024-06-21 15:45:21,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4368, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4595, PETRI_PLACES=343, PETRI_TRANSITIONS=415} [2024-06-21 15:45:21,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-21 15:45:21,476 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 415 transitions, 4595 flow [2024-06-21 15:45:21,476 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) [2024-06-21 15:45:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:21,476 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, 1] [2024-06-21 15:45:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 15:45:21,477 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:21,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1532513484, now seen corresponding path program 2 times [2024-06-21 15:45:21,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:21,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935540192] [2024-06-21 15:45:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:21,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935540192] [2024-06-21 15:45:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935540192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:21,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:21,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205966392] [2024-06-21 15:45:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:21,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:21,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:21,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 415 transitions, 4595 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:21,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:21,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:21,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:22,359 INFO L124 PetriNetUnfolderBase]: 2262/3823 cut-off events. [2024-06-21 15:45:22,359 INFO L125 PetriNetUnfolderBase]: For 437724/437736 co-relation queries the response was YES. [2024-06-21 15:45:22,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29803 conditions, 3823 events. 2262/3823 cut-off events. For 437724/437736 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24016 event pairs, 352 based on Foata normal form. 18/3840 useless extension candidates. Maximal degree in co-relation 29646. Up to 2645 conditions per place. [2024-06-21 15:45:22,402 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 347 selfloop transitions, 103 changer transitions 0/457 dead transitions. [2024-06-21 15:45:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 457 transitions, 6311 flow [2024-06-21 15:45:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-21 15:45:22,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-21 15:45:22,403 INFO L175 Difference]: Start difference. First operand has 343 places, 415 transitions, 4595 flow. Second operand 10 states and 232 transitions. [2024-06-21 15:45:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 457 transitions, 6311 flow [2024-06-21 15:45:23,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 457 transitions, 6193 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 15:45:23,871 INFO L231 Difference]: Finished difference. Result has 349 places, 418 transitions, 4765 flow [2024-06-21 15:45:23,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4765, PETRI_PLACES=349, PETRI_TRANSITIONS=418} [2024-06-21 15:45:23,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 15:45:23,871 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 418 transitions, 4765 flow [2024-06-21 15:45:23,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:23,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:23,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:23,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 15:45:23,871 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:23,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1705240524, now seen corresponding path program 3 times [2024-06-21 15:45:23,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:23,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528039595] [2024-06-21 15:45:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:23,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:23,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528039595] [2024-06-21 15:45:23,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528039595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:23,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:23,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:23,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191342440] [2024-06-21 15:45:23,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:23,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:24,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:24,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 418 transitions, 4765 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:24,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:24,656 INFO L124 PetriNetUnfolderBase]: 2249/3800 cut-off events. [2024-06-21 15:45:24,656 INFO L125 PetriNetUnfolderBase]: For 423145/423157 co-relation queries the response was YES. [2024-06-21 15:45:24,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29287 conditions, 3800 events. 2249/3800 cut-off events. For 423145/423157 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23778 event pairs, 360 based on Foata normal form. 18/3817 useless extension candidates. Maximal degree in co-relation 29130. Up to 2639 conditions per place. [2024-06-21 15:45:24,706 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 341 selfloop transitions, 106 changer transitions 0/454 dead transitions. [2024-06-21 15:45:24,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 454 transitions, 6193 flow [2024-06-21 15:45:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:45:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:45:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-21 15:45:24,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-21 15:45:24,707 INFO L175 Difference]: Start difference. First operand has 349 places, 418 transitions, 4765 flow. Second operand 10 states and 229 transitions. [2024-06-21 15:45:24,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 454 transitions, 6193 flow [2024-06-21 15:45:26,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 454 transitions, 6027 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:45:26,021 INFO L231 Difference]: Finished difference. Result has 354 places, 418 transitions, 4815 flow [2024-06-21 15:45:26,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4815, PETRI_PLACES=354, PETRI_TRANSITIONS=418} [2024-06-21 15:45:26,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 15:45:26,021 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 418 transitions, 4815 flow [2024-06-21 15:45:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:26,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:26,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:26,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 15:45:26,022 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:26,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash 740101138, now seen corresponding path program 4 times [2024-06-21 15:45:26,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:26,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122760091] [2024-06-21 15:45:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:26,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:26,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122760091] [2024-06-21 15:45:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122760091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:26,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479333300] [2024-06-21 15:45:26,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:26,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:26,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:26,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:26,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 418 transitions, 4815 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:26,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:26,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:26,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:26,903 INFO L124 PetriNetUnfolderBase]: 2381/4008 cut-off events. [2024-06-21 15:45:26,903 INFO L125 PetriNetUnfolderBase]: For 520983/520991 co-relation queries the response was YES. [2024-06-21 15:45:26,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32496 conditions, 4008 events. 2381/4008 cut-off events. For 520983/520991 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25326 event pairs, 541 based on Foata normal form. 14/4015 useless extension candidates. Maximal degree in co-relation 32338. Up to 3069 conditions per place. [2024-06-21 15:45:26,950 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 356 selfloop transitions, 98 changer transitions 0/461 dead transitions. [2024-06-21 15:45:26,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 461 transitions, 6335 flow [2024-06-21 15:45:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:45:26,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 15:45:26,951 INFO L175 Difference]: Start difference. First operand has 354 places, 418 transitions, 4815 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:45:26,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 461 transitions, 6335 flow [2024-06-21 15:45:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 461 transitions, 6125 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:28,437 INFO L231 Difference]: Finished difference. Result has 355 places, 422 transitions, 4891 flow [2024-06-21 15:45:28,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4891, PETRI_PLACES=355, PETRI_TRANSITIONS=422} [2024-06-21 15:45:28,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-21 15:45:28,438 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 422 transitions, 4891 flow [2024-06-21 15:45:28,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:28,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:28,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 15:45:28,438 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:28,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash 882204208, now seen corresponding path program 5 times [2024-06-21 15:45:28,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:28,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111988657] [2024-06-21 15:45:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:28,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:28,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111988657] [2024-06-21 15:45:28,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111988657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:28,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:28,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:28,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776050853] [2024-06-21 15:45:28,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:28,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:28,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:28,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:28,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 422 transitions, 4891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:28,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:28,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:28,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:29,250 INFO L124 PetriNetUnfolderBase]: 2409/4053 cut-off events. [2024-06-21 15:45:29,250 INFO L125 PetriNetUnfolderBase]: For 540813/540821 co-relation queries the response was YES. [2024-06-21 15:45:29,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32973 conditions, 4053 events. 2409/4053 cut-off events. For 540813/540821 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 25609 event pairs, 583 based on Foata normal form. 16/4065 useless extension candidates. Maximal degree in co-relation 32813. Up to 3296 conditions per place. [2024-06-21 15:45:29,305 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 357 selfloop transitions, 95 changer transitions 0/459 dead transitions. [2024-06-21 15:45:29,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 459 transitions, 6169 flow [2024-06-21 15:45:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:45:29,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 15:45:29,306 INFO L175 Difference]: Start difference. First operand has 355 places, 422 transitions, 4891 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:45:29,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 459 transitions, 6169 flow [2024-06-21 15:45:31,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 459 transitions, 6049 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 15:45:31,086 INFO L231 Difference]: Finished difference. Result has 360 places, 423 transitions, 4987 flow [2024-06-21 15:45:31,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4987, PETRI_PLACES=360, PETRI_TRANSITIONS=423} [2024-06-21 15:45:31,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-21 15:45:31,086 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 423 transitions, 4987 flow [2024-06-21 15:45:31,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:31,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:31,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:31,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 15:45:31,087 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:31,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash -962535718, now seen corresponding path program 6 times [2024-06-21 15:45:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:31,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968413309] [2024-06-21 15:45:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:31,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968413309] [2024-06-21 15:45:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968413309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:31,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:31,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:31,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937490164] [2024-06-21 15:45:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:31,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:31,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 423 transitions, 4987 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:31,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:31,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:31,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:31,959 INFO L124 PetriNetUnfolderBase]: 2437/4099 cut-off events. [2024-06-21 15:45:31,959 INFO L125 PetriNetUnfolderBase]: For 551571/551579 co-relation queries the response was YES. [2024-06-21 15:45:32,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33545 conditions, 4099 events. 2437/4099 cut-off events. For 551571/551579 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25963 event pairs, 615 based on Foata normal form. 16/4113 useless extension candidates. Maximal degree in co-relation 33383. Up to 3506 conditions per place. [2024-06-21 15:45:32,013 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 94 changer transitions 0/452 dead transitions. [2024-06-21 15:45:32,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 452 transitions, 6007 flow [2024-06-21 15:45:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:45:32,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:45:32,014 INFO L175 Difference]: Start difference. First operand has 360 places, 423 transitions, 4987 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:45:32,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 452 transitions, 6007 flow [2024-06-21 15:45:33,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 452 transitions, 5798 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:33,856 INFO L231 Difference]: Finished difference. Result has 362 places, 424 transitions, 4995 flow [2024-06-21 15:45:33,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4995, PETRI_PLACES=362, PETRI_TRANSITIONS=424} [2024-06-21 15:45:33,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-21 15:45:33,857 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 424 transitions, 4995 flow [2024-06-21 15:45:33,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:33,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:33,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:33,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 15:45:33,857 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:33,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:33,858 INFO L85 PathProgramCache]: Analyzing trace with hash 740221294, now seen corresponding path program 4 times [2024-06-21 15:45:33,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:33,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100296356] [2024-06-21 15:45:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:33,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:33,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100296356] [2024-06-21 15:45:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100296356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:33,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:33,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893381422] [2024-06-21 15:45:33,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:34,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 424 transitions, 4995 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:34,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:34,746 INFO L124 PetriNetUnfolderBase]: 2503/4197 cut-off events. [2024-06-21 15:45:34,746 INFO L125 PetriNetUnfolderBase]: For 590757/590769 co-relation queries the response was YES. [2024-06-21 15:45:34,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35103 conditions, 4197 events. 2503/4197 cut-off events. For 590757/590769 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26650 event pairs, 599 based on Foata normal form. 18/4205 useless extension candidates. Maximal degree in co-relation 34940. Up to 3571 conditions per place. [2024-06-21 15:45:34,804 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 362 selfloop transitions, 93 changer transitions 0/462 dead transitions. [2024-06-21 15:45:34,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 462 transitions, 6296 flow [2024-06-21 15:45:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-21 15:45:34,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-21 15:45:34,805 INFO L175 Difference]: Start difference. First operand has 362 places, 424 transitions, 4995 flow. Second operand 11 states and 246 transitions. [2024-06-21 15:45:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 462 transitions, 6296 flow [2024-06-21 15:45:36,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 462 transitions, 6107 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:36,706 INFO L231 Difference]: Finished difference. Result has 368 places, 426 transitions, 5071 flow [2024-06-21 15:45:36,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5071, PETRI_PLACES=368, PETRI_TRANSITIONS=426} [2024-06-21 15:45:36,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 15:45:36,706 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 426 transitions, 5071 flow [2024-06-21 15:45:36,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:36,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:36,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:36,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 15:45:36,706 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:36,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash 740221108, now seen corresponding path program 7 times [2024-06-21 15:45:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064735610] [2024-06-21 15:45:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:36,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:36,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064735610] [2024-06-21 15:45:36,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064735610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:36,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:36,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248426870] [2024-06-21 15:45:36,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:36,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:36,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:36,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:36,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:36,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:36,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 426 transitions, 5071 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:36,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:36,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:36,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:37,596 INFO L124 PetriNetUnfolderBase]: 2490/4184 cut-off events. [2024-06-21 15:45:37,596 INFO L125 PetriNetUnfolderBase]: For 576651/576663 co-relation queries the response was YES. [2024-06-21 15:45:37,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34613 conditions, 4184 events. 2490/4184 cut-off events. For 576651/576663 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26619 event pairs, 592 based on Foata normal form. 18/4190 useless extension candidates. Maximal degree in co-relation 34448. Up to 3678 conditions per place. [2024-06-21 15:45:37,656 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 401 selfloop transitions, 47 changer transitions 0/455 dead transitions. [2024-06-21 15:45:37,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 455 transitions, 6055 flow [2024-06-21 15:45:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 15:45:37,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 15:45:37,657 INFO L175 Difference]: Start difference. First operand has 368 places, 426 transitions, 5071 flow. Second operand 8 states and 185 transitions. [2024-06-21 15:45:37,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 455 transitions, 6055 flow [2024-06-21 15:45:39,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 455 transitions, 5886 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:45:39,500 INFO L231 Difference]: Finished difference. Result has 369 places, 426 transitions, 5000 flow [2024-06-21 15:45:39,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5000, PETRI_PLACES=369, PETRI_TRANSITIONS=426} [2024-06-21 15:45:39,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 15:45:39,501 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 426 transitions, 5000 flow [2024-06-21 15:45:39,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:39,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:39,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:39,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 15:45:39,501 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:39,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:39,501 INFO L85 PathProgramCache]: Analyzing trace with hash -553870406, now seen corresponding path program 8 times [2024-06-21 15:45:39,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:39,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14469790] [2024-06-21 15:45:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:39,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:39,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:39,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14469790] [2024-06-21 15:45:39,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14469790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:39,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:39,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:39,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748528357] [2024-06-21 15:45:39,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:39,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:39,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:39,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:39,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 426 transitions, 5000 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:39,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:39,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:39,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:40,478 INFO L124 PetriNetUnfolderBase]: 2564/4307 cut-off events. [2024-06-21 15:45:40,478 INFO L125 PetriNetUnfolderBase]: For 626398/626410 co-relation queries the response was YES. [2024-06-21 15:45:40,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36162 conditions, 4307 events. 2564/4307 cut-off events. For 626398/626410 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27511 event pairs, 619 based on Foata normal form. 18/4322 useless extension candidates. Maximal degree in co-relation 35996. Up to 3769 conditions per place. [2024-06-21 15:45:40,537 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 48 changer transitions 0/460 dead transitions. [2024-06-21 15:45:40,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 460 transitions, 6295 flow [2024-06-21 15:45:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 15:45:40,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 15:45:40,538 INFO L175 Difference]: Start difference. First operand has 369 places, 426 transitions, 5000 flow. Second operand 9 states and 203 transitions. [2024-06-21 15:45:40,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 460 transitions, 6295 flow [2024-06-21 15:45:42,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 460 transitions, 6192 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:42,856 INFO L231 Difference]: Finished difference. Result has 373 places, 430 transitions, 5078 flow [2024-06-21 15:45:42,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5078, PETRI_PLACES=373, PETRI_TRANSITIONS=430} [2024-06-21 15:45:42,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 15:45:42,856 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 430 transitions, 5078 flow [2024-06-21 15:45:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:42,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 15:45:42,857 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:42,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 747630604, now seen corresponding path program 5 times [2024-06-21 15:45:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234010183] [2024-06-21 15:45:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:42,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:42,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234010183] [2024-06-21 15:45:42,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234010183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:42,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:42,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:42,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409549924] [2024-06-21 15:45:42,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:42,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:42,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:43,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:43,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 430 transitions, 5078 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:43,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:43,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:43,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:43,840 INFO L124 PetriNetUnfolderBase]: 2630/4409 cut-off events. [2024-06-21 15:45:43,840 INFO L125 PetriNetUnfolderBase]: For 679046/679058 co-relation queries the response was YES. [2024-06-21 15:45:43,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 4409 events. 2630/4409 cut-off events. For 679046/679058 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28222 event pairs, 635 based on Foata normal form. 18/4424 useless extension candidates. Maximal degree in co-relation 37812. Up to 3822 conditions per place. [2024-06-21 15:45:43,903 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 367 selfloop transitions, 91 changer transitions 0/465 dead transitions. [2024-06-21 15:45:43,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 465 transitions, 6390 flow [2024-06-21 15:45:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:45:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:45:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-21 15:45:43,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 15:45:43,904 INFO L175 Difference]: Start difference. First operand has 373 places, 430 transitions, 5078 flow. Second operand 12 states and 260 transitions. [2024-06-21 15:45:43,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 465 transitions, 6390 flow [2024-06-21 15:45:46,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 465 transitions, 6292 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:46,081 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 5226 flow [2024-06-21 15:45:46,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5226, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2024-06-21 15:45:46,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 15:45:46,082 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 5226 flow [2024-06-21 15:45:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:46,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:46,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:46,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 15:45:46,082 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:46,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1006066258, now seen corresponding path program 9 times [2024-06-21 15:45:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337149418] [2024-06-21 15:45:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:46,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:46,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:46,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337149418] [2024-06-21 15:45:46,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337149418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:46,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:46,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612543073] [2024-06-21 15:45:46,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:46,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:46,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:46,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 5226 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:47,043 INFO L124 PetriNetUnfolderBase]: 2612/4389 cut-off events. [2024-06-21 15:45:47,043 INFO L125 PetriNetUnfolderBase]: For 664208/664220 co-relation queries the response was YES. [2024-06-21 15:45:47,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37231 conditions, 4389 events. 2612/4389 cut-off events. For 664208/664220 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28184 event pairs, 637 based on Foata normal form. 20/4408 useless extension candidates. Maximal degree in co-relation 37062. Up to 3893 conditions per place. [2024-06-21 15:45:47,104 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 45 changer transitions 0/457 dead transitions. [2024-06-21 15:45:47,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 457 transitions, 6226 flow [2024-06-21 15:45:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:45:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:45:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 15:45:47,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 15:45:47,105 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 5226 flow. Second operand 8 states and 182 transitions. [2024-06-21 15:45:47,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 457 transitions, 6226 flow [2024-06-21 15:45:49,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 457 transitions, 6097 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 15:45:49,491 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 5192 flow [2024-06-21 15:45:49,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5192, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2024-06-21 15:45:49,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 15:45:49,492 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 5192 flow [2024-06-21 15:45:49,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:49,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:49,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:49,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 15:45:49,493 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:49,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245004, now seen corresponding path program 6 times [2024-06-21 15:45:49,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:49,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773808433] [2024-06-21 15:45:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:49,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:49,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:49,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773808433] [2024-06-21 15:45:49,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773808433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:49,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:49,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911752921] [2024-06-21 15:45:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:49,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:49,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:49,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 5192 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:49,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:49,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:49,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:50,419 INFO L124 PetriNetUnfolderBase]: 2594/4367 cut-off events. [2024-06-21 15:45:50,419 INFO L125 PetriNetUnfolderBase]: For 634886/634898 co-relation queries the response was YES. [2024-06-21 15:45:50,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36323 conditions, 4367 events. 2594/4367 cut-off events. For 634886/634898 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28054 event pairs, 631 based on Foata normal form. 20/4386 useless extension candidates. Maximal degree in co-relation 36152. Up to 3818 conditions per place. [2024-06-21 15:45:50,481 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 88 changer transitions 0/460 dead transitions. [2024-06-21 15:45:50,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 460 transitions, 6208 flow [2024-06-21 15:45:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-21 15:45:50,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-21 15:45:50,482 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 5192 flow. Second operand 11 states and 239 transitions. [2024-06-21 15:45:50,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 460 transitions, 6208 flow [2024-06-21 15:45:52,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 460 transitions, 6113 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:45:52,830 INFO L231 Difference]: Finished difference. Result has 384 places, 432 transitions, 5278 flow [2024-06-21 15:45:52,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5278, PETRI_PLACES=384, PETRI_TRANSITIONS=432} [2024-06-21 15:45:52,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-21 15:45:52,831 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 432 transitions, 5278 flow [2024-06-21 15:45:52,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:52,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:52,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:52,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 15:45:52,832 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:52,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash 235415692, now seen corresponding path program 7 times [2024-06-21 15:45:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640678879] [2024-06-21 15:45:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:52,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:52,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640678879] [2024-06-21 15:45:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640678879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:52,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621724110] [2024-06-21 15:45:52,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:52,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:52,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:52,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:52,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:52,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:52,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 432 transitions, 5278 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:52,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:52,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:52,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:53,817 INFO L124 PetriNetUnfolderBase]: 2776/4639 cut-off events. [2024-06-21 15:45:53,817 INFO L125 PetriNetUnfolderBase]: For 764493/764505 co-relation queries the response was YES. [2024-06-21 15:45:53,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41084 conditions, 4639 events. 2776/4639 cut-off events. For 764493/764505 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 29950 event pairs, 649 based on Foata normal form. 18/4650 useless extension candidates. Maximal degree in co-relation 40912. Up to 3774 conditions per place. [2024-06-21 15:45:53,886 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 372 selfloop transitions, 97 changer transitions 0/476 dead transitions. [2024-06-21 15:45:53,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 476 transitions, 6988 flow [2024-06-21 15:45:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:45:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:45:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-21 15:45:53,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-21 15:45:53,886 INFO L175 Difference]: Start difference. First operand has 384 places, 432 transitions, 5278 flow. Second operand 11 states and 245 transitions. [2024-06-21 15:45:53,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 476 transitions, 6988 flow [2024-06-21 15:45:56,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 476 transitions, 6813 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 15:45:56,616 INFO L231 Difference]: Finished difference. Result has 388 places, 440 transitions, 5506 flow [2024-06-21 15:45:56,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5506, PETRI_PLACES=388, PETRI_TRANSITIONS=440} [2024-06-21 15:45:56,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 15:45:56,617 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 440 transitions, 5506 flow [2024-06-21 15:45:56,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:56,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:45:56,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:45:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 15:45:56,617 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:45:56,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:45:56,618 INFO L85 PathProgramCache]: Analyzing trace with hash -657948492, now seen corresponding path program 10 times [2024-06-21 15:45:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:45:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309080830] [2024-06-21 15:45:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:45:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:45:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:45:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:45:56,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:45:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309080830] [2024-06-21 15:45:56,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309080830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:45:56,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:45:56,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:45:56,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079066365] [2024-06-21 15:45:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:45:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:45:56,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:45:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:45:56,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:45:56,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:45:56,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 440 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:45:56,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:45:56,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:45:56,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:45:57,671 INFO L124 PetriNetUnfolderBase]: 2921/4864 cut-off events. [2024-06-21 15:45:57,672 INFO L125 PetriNetUnfolderBase]: For 900603/900615 co-relation queries the response was YES. [2024-06-21 15:45:57,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 4864 events. 2921/4864 cut-off events. For 900603/900615 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31620 event pairs, 712 based on Foata normal form. 18/4873 useless extension candidates. Maximal degree in co-relation 45203. Up to 4141 conditions per place. [2024-06-21 15:45:57,745 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 62 changer transitions 0/474 dead transitions. [2024-06-21 15:45:57,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 474 transitions, 6870 flow [2024-06-21 15:45:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:45:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:45:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-21 15:45:57,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 15:45:57,746 INFO L175 Difference]: Start difference. First operand has 388 places, 440 transitions, 5506 flow. Second operand 9 states and 201 transitions. [2024-06-21 15:45:57,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 474 transitions, 6870 flow [2024-06-21 15:46:00,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 474 transitions, 6749 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 15:46:00,655 INFO L231 Difference]: Finished difference. Result has 392 places, 446 transitions, 5649 flow [2024-06-21 15:46:00,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5649, PETRI_PLACES=392, PETRI_TRANSITIONS=446} [2024-06-21 15:46:00,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-21 15:46:00,655 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 446 transitions, 5649 flow [2024-06-21 15:46:00,655 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) [2024-06-21 15:46:00,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:00,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 15:46:00,656 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:00,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash -569234862, now seen corresponding path program 11 times [2024-06-21 15:46:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:00,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281920263] [2024-06-21 15:46:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:00,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281920263] [2024-06-21 15:46:00,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281920263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:00,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:00,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:00,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785826543] [2024-06-21 15:46:00,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:00,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:00,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:00,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 446 transitions, 5649 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:00,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:00,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:00,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:01,726 INFO L124 PetriNetUnfolderBase]: 2903/4850 cut-off events. [2024-06-21 15:46:01,726 INFO L125 PetriNetUnfolderBase]: For 885480/885492 co-relation queries the response was YES. [2024-06-21 15:46:01,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44887 conditions, 4850 events. 2903/4850 cut-off events. For 885480/885492 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31588 event pairs, 722 based on Foata normal form. 20/4869 useless extension candidates. Maximal degree in co-relation 44709. Up to 4336 conditions per place. [2024-06-21 15:46:01,799 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 411 selfloop transitions, 51 changer transitions 0/469 dead transitions. [2024-06-21 15:46:01,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 469 transitions, 6667 flow [2024-06-21 15:46:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:46:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:46:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 15:46:01,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-21 15:46:01,800 INFO L175 Difference]: Start difference. First operand has 392 places, 446 transitions, 5649 flow. Second operand 9 states and 197 transitions. [2024-06-21 15:46:01,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 469 transitions, 6667 flow [2024-06-21 15:46:05,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 469 transitions, 6554 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:46:05,052 INFO L231 Difference]: Finished difference. Result has 396 places, 446 transitions, 5643 flow [2024-06-21 15:46:05,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5643, PETRI_PLACES=396, PETRI_TRANSITIONS=446} [2024-06-21 15:46:05,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 15:46:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 446 transitions, 5643 flow [2024-06-21 15:46:05,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:05,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:05,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:05,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 15:46:05,053 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:05,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -569056116, now seen corresponding path program 8 times [2024-06-21 15:46:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632044236] [2024-06-21 15:46:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:05,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:05,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632044236] [2024-06-21 15:46:05,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632044236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:05,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:05,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:05,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921405887] [2024-06-21 15:46:05,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:05,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:05,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:05,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:05,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:05,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 446 transitions, 5643 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:05,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:05,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:05,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:06,126 INFO L124 PetriNetUnfolderBase]: 2931/4898 cut-off events. [2024-06-21 15:46:06,127 INFO L125 PetriNetUnfolderBase]: For 902597/902609 co-relation queries the response was YES. [2024-06-21 15:46:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45308 conditions, 4898 events. 2931/4898 cut-off events. For 902597/902609 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32005 event pairs, 728 based on Foata normal form. 20/4917 useless extension candidates. Maximal degree in co-relation 45129. Up to 4337 conditions per place. [2024-06-21 15:46:06,201 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 380 selfloop transitions, 86 changer transitions 0/473 dead transitions. [2024-06-21 15:46:06,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 473 transitions, 6713 flow [2024-06-21 15:46:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:46:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:46:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-21 15:46:06,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-21 15:46:06,202 INFO L175 Difference]: Start difference. First operand has 396 places, 446 transitions, 5643 flow. Second operand 12 states and 255 transitions. [2024-06-21 15:46:06,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 473 transitions, 6713 flow [2024-06-21 15:46:09,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 473 transitions, 6606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:46:09,350 INFO L231 Difference]: Finished difference. Result has 401 places, 447 transitions, 5749 flow [2024-06-21 15:46:09,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5749, PETRI_PLACES=401, PETRI_TRANSITIONS=447} [2024-06-21 15:46:09,350 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-21 15:46:09,350 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 447 transitions, 5749 flow [2024-06-21 15:46:09,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:09,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:09,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 15:46:09,351 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:09,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -657711156, now seen corresponding path program 9 times [2024-06-21 15:46:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:09,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742552724] [2024-06-21 15:46:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742552724] [2024-06-21 15:46:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742552724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:09,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:09,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:09,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488183872] [2024-06-21 15:46:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:09,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:09,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:09,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 447 transitions, 5749 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:09,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:09,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:09,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:10,458 INFO L124 PetriNetUnfolderBase]: 3017/5024 cut-off events. [2024-06-21 15:46:10,458 INFO L125 PetriNetUnfolderBase]: For 976404/976416 co-relation queries the response was YES. [2024-06-21 15:46:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 5024 events. 3017/5024 cut-off events. For 976404/976416 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32836 event pairs, 706 based on Foata normal form. 18/5033 useless extension candidates. Maximal degree in co-relation 47769. Up to 4035 conditions per place. [2024-06-21 15:46:10,535 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 373 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2024-06-21 15:46:10,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 483 transitions, 7381 flow [2024-06-21 15:46:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:46:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:46:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-21 15:46:10,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-21 15:46:10,535 INFO L175 Difference]: Start difference. First operand has 401 places, 447 transitions, 5749 flow. Second operand 11 states and 244 transitions. [2024-06-21 15:46:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 483 transitions, 7381 flow [2024-06-21 15:46:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 483 transitions, 7200 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 15:46:14,148 INFO L231 Difference]: Finished difference. Result has 402 places, 450 transitions, 5876 flow [2024-06-21 15:46:14,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5876, PETRI_PLACES=402, PETRI_TRANSITIONS=450} [2024-06-21 15:46:14,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-21 15:46:14,148 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 450 transitions, 5876 flow [2024-06-21 15:46:14,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:14,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:14,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:14,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 15:46:14,149 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:14,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash -144599782, now seen corresponding path program 12 times [2024-06-21 15:46:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998463147] [2024-06-21 15:46:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998463147] [2024-06-21 15:46:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998463147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:14,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:14,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653939421] [2024-06-21 15:46:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:14,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:14,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:14,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:14,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 450 transitions, 5876 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:14,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:14,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:14,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:15,237 INFO L124 PetriNetUnfolderBase]: 3004/5011 cut-off events. [2024-06-21 15:46:15,237 INFO L125 PetriNetUnfolderBase]: For 963135/963147 co-relation queries the response was YES. [2024-06-21 15:46:15,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47490 conditions, 5011 events. 3004/5011 cut-off events. For 963135/963147 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32857 event pairs, 749 based on Foata normal form. 18/5026 useless extension candidates. Maximal degree in co-relation 47309. Up to 4465 conditions per place. [2024-06-21 15:46:15,315 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 416 selfloop transitions, 54 changer transitions 0/477 dead transitions. [2024-06-21 15:46:15,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 477 transitions, 6936 flow [2024-06-21 15:46:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:46:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:46:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-21 15:46:15,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-21 15:46:15,316 INFO L175 Difference]: Start difference. First operand has 402 places, 450 transitions, 5876 flow. Second operand 10 states and 217 transitions. [2024-06-21 15:46:15,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 477 transitions, 6936 flow [2024-06-21 15:46:19,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 477 transitions, 6750 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 15:46:19,078 INFO L231 Difference]: Finished difference. Result has 405 places, 450 transitions, 5802 flow [2024-06-21 15:46:19,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5802, PETRI_PLACES=405, PETRI_TRANSITIONS=450} [2024-06-21 15:46:19,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-21 15:46:19,079 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 450 transitions, 5802 flow [2024-06-21 15:46:19,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:19,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:19,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 15:46:19,080 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:19,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -181467648, now seen corresponding path program 10 times [2024-06-21 15:46:19,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474870423] [2024-06-21 15:46:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:19,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:19,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:19,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474870423] [2024-06-21 15:46:19,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474870423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:19,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:19,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194957374] [2024-06-21 15:46:19,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:19,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:19,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:19,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 450 transitions, 5802 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:19,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:19,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:19,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:20,208 INFO L124 PetriNetUnfolderBase]: 2991/4992 cut-off events. [2024-06-21 15:46:20,208 INFO L125 PetriNetUnfolderBase]: For 942976/942988 co-relation queries the response was YES. [2024-06-21 15:46:20,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46529 conditions, 4992 events. 2991/4992 cut-off events. For 942976/942988 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32720 event pairs, 742 based on Foata normal form. 18/5007 useless extension candidates. Maximal degree in co-relation 46347. Up to 4353 conditions per place. [2024-06-21 15:46:20,284 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 383 selfloop transitions, 90 changer transitions 0/480 dead transitions. [2024-06-21 15:46:20,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 480 transitions, 7096 flow [2024-06-21 15:46:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:46:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:46:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-21 15:46:20,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 15:46:20,285 INFO L175 Difference]: Start difference. First operand has 405 places, 450 transitions, 5802 flow. Second operand 12 states and 258 transitions. [2024-06-21 15:46:20,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 480 transitions, 7096 flow [2024-06-21 15:46:24,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 480 transitions, 6984 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 15:46:24,119 INFO L231 Difference]: Finished difference. Result has 410 places, 450 transitions, 5874 flow [2024-06-21 15:46:24,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5874, PETRI_PLACES=410, PETRI_TRANSITIONS=450} [2024-06-21 15:46:24,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 15:46:24,120 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 450 transitions, 5874 flow [2024-06-21 15:46:24,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:24,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:24,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:24,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 15:46:24,120 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:24,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -814718542, now seen corresponding path program 11 times [2024-06-21 15:46:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:24,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25258907] [2024-06-21 15:46:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25258907] [2024-06-21 15:46:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25258907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:24,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:24,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345217254] [2024-06-21 15:46:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:24,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:24,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 450 transitions, 5874 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:24,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:24,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:24,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:25,335 INFO L124 PetriNetUnfolderBase]: 2973/4968 cut-off events. [2024-06-21 15:46:25,335 INFO L125 PetriNetUnfolderBase]: For 925465/925477 co-relation queries the response was YES. [2024-06-21 15:46:25,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45638 conditions, 4968 events. 2973/4968 cut-off events. For 925465/925477 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32568 event pairs, 742 based on Foata normal form. 20/4987 useless extension candidates. Maximal degree in co-relation 45455. Up to 4407 conditions per place. [2024-06-21 15:46:25,402 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 85 changer transitions 0/474 dead transitions. [2024-06-21 15:46:25,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 474 transitions, 6908 flow [2024-06-21 15:46:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:46:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:46:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 15:46:25,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-21 15:46:25,403 INFO L175 Difference]: Start difference. First operand has 410 places, 450 transitions, 5874 flow. Second operand 10 states and 219 transitions. [2024-06-21 15:46:25,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 474 transitions, 6908 flow [2024-06-21 15:46:28,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 474 transitions, 6717 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 15:46:28,906 INFO L231 Difference]: Finished difference. Result has 411 places, 450 transitions, 5858 flow [2024-06-21 15:46:28,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5858, PETRI_PLACES=411, PETRI_TRANSITIONS=450} [2024-06-21 15:46:28,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 15:46:28,907 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 450 transitions, 5858 flow [2024-06-21 15:46:28,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:28,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:28,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 15:46:28,907 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:28,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -344011926, now seen corresponding path program 12 times [2024-06-21 15:46:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:28,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249696946] [2024-06-21 15:46:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:29,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:29,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249696946] [2024-06-21 15:46:29,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249696946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:29,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:29,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180638527] [2024-06-21 15:46:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:29,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:29,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:29,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:29,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 450 transitions, 5858 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:29,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:29,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:29,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:29,979 INFO L124 PetriNetUnfolderBase]: 2955/4942 cut-off events. [2024-06-21 15:46:29,979 INFO L125 PetriNetUnfolderBase]: For 891835/891847 co-relation queries the response was YES. [2024-06-21 15:46:30,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44541 conditions, 4942 events. 2955/4942 cut-off events. For 891835/891847 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32391 event pairs, 718 based on Foata normal form. 20/4961 useless extension candidates. Maximal degree in co-relation 44357. Up to 4191 conditions per place. [2024-06-21 15:46:30,056 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 383 selfloop transitions, 89 changer transitions 0/479 dead transitions. [2024-06-21 15:46:30,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 479 transitions, 7174 flow [2024-06-21 15:46:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:46:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:46:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 15:46:30,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-21 15:46:30,057 INFO L175 Difference]: Start difference. First operand has 411 places, 450 transitions, 5858 flow. Second operand 10 states and 223 transitions. [2024-06-21 15:46:30,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 479 transitions, 7174 flow [2024-06-21 15:46:33,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 479 transitions, 6995 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 15:46:33,780 INFO L231 Difference]: Finished difference. Result has 413 places, 450 transitions, 5861 flow [2024-06-21 15:46:33,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5679, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5861, PETRI_PLACES=413, PETRI_TRANSITIONS=450} [2024-06-21 15:46:33,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 15:46:33,781 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 450 transitions, 5861 flow [2024-06-21 15:46:33,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:33,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:33,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 15:46:33,781 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:33,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 442866510, now seen corresponding path program 13 times [2024-06-21 15:46:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:33,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585776921] [2024-06-21 15:46:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:33,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:33,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585776921] [2024-06-21 15:46:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585776921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:33,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:33,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295463160] [2024-06-21 15:46:33,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:33,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:33,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:33,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:33,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:33,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 450 transitions, 5861 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:33,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:33,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:33,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:34,908 INFO L124 PetriNetUnfolderBase]: 3062/5106 cut-off events. [2024-06-21 15:46:34,908 INFO L125 PetriNetUnfolderBase]: For 996443/996451 co-relation queries the response was YES. [2024-06-21 15:46:34,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47429 conditions, 5106 events. 3062/5106 cut-off events. For 996443/996451 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33568 event pairs, 774 based on Foata normal form. 16/5120 useless extension candidates. Maximal degree in co-relation 47244. Up to 4312 conditions per place. [2024-06-21 15:46:34,988 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 74 changer transitions 0/485 dead transitions. [2024-06-21 15:46:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 485 transitions, 7263 flow [2024-06-21 15:46:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:46:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:46:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:46:34,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 15:46:34,988 INFO L175 Difference]: Start difference. First operand has 413 places, 450 transitions, 5861 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:46:34,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 485 transitions, 7263 flow [2024-06-21 15:46:39,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 485 transitions, 7091 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:46:39,624 INFO L231 Difference]: Finished difference. Result has 413 places, 453 transitions, 5926 flow [2024-06-21 15:46:39,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5926, PETRI_PLACES=413, PETRI_TRANSITIONS=453} [2024-06-21 15:46:39,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 15:46:39,625 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 453 transitions, 5926 flow [2024-06-21 15:46:39,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:39,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:39,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 15:46:39,625 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:39,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 451437390, now seen corresponding path program 14 times [2024-06-21 15:46:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714380495] [2024-06-21 15:46:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:39,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:39,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:39,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714380495] [2024-06-21 15:46:39,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714380495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:39,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:39,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792615792] [2024-06-21 15:46:39,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:39,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:39,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:39,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 453 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:39,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:40,728 INFO L124 PetriNetUnfolderBase]: 3090/5150 cut-off events. [2024-06-21 15:46:40,729 INFO L125 PetriNetUnfolderBase]: For 1015699/1015707 co-relation queries the response was YES. [2024-06-21 15:46:40,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48015 conditions, 5150 events. 3090/5150 cut-off events. For 1015699/1015707 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33910 event pairs, 794 based on Foata normal form. 16/5164 useless extension candidates. Maximal degree in co-relation 47828. Up to 4564 conditions per place. [2024-06-21 15:46:40,806 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 399 selfloop transitions, 72 changer transitions 0/478 dead transitions. [2024-06-21 15:46:40,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 478 transitions, 6993 flow [2024-06-21 15:46:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:46:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:46:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 15:46:40,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 15:46:40,807 INFO L175 Difference]: Start difference. First operand has 413 places, 453 transitions, 5926 flow. Second operand 7 states and 166 transitions. [2024-06-21 15:46:40,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 478 transitions, 6993 flow [2024-06-21 15:46:45,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 478 transitions, 6883 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 15:46:45,270 INFO L231 Difference]: Finished difference. Result has 417 places, 454 transitions, 5994 flow [2024-06-21 15:46:45,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5994, PETRI_PLACES=417, PETRI_TRANSITIONS=454} [2024-06-21 15:46:45,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 15:46:45,271 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 454 transitions, 5994 flow [2024-06-21 15:46:45,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:45,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:45,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:45,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 15:46:45,271 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:45,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1301146394, now seen corresponding path program 15 times [2024-06-21 15:46:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:45,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236132646] [2024-06-21 15:46:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:45,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:45,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236132646] [2024-06-21 15:46:45,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236132646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:45,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:45,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:45,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956033031] [2024-06-21 15:46:45,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:45,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:45,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:45,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:45,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 454 transitions, 5994 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:45,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:45,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:45,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:46,545 INFO L124 PetriNetUnfolderBase]: 3151/5246 cut-off events. [2024-06-21 15:46:46,545 INFO L125 PetriNetUnfolderBase]: For 1070904/1070916 co-relation queries the response was YES. [2024-06-21 15:46:46,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49517 conditions, 5246 events. 3151/5246 cut-off events. For 1070904/1070916 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34616 event pairs, 786 based on Foata normal form. 20/5265 useless extension candidates. Maximal degree in co-relation 49328. Up to 4483 conditions per place. [2024-06-21 15:46:46,619 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 412 selfloop transitions, 77 changer transitions 0/496 dead transitions. [2024-06-21 15:46:46,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 496 transitions, 7424 flow [2024-06-21 15:46:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:46:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:46:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 15:46:46,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 15:46:46,620 INFO L175 Difference]: Start difference. First operand has 417 places, 454 transitions, 5994 flow. Second operand 9 states and 216 transitions. [2024-06-21 15:46:46,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 496 transitions, 7424 flow [2024-06-21 15:46:51,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 496 transitions, 7277 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 15:46:51,049 INFO L231 Difference]: Finished difference. Result has 421 places, 456 transitions, 6059 flow [2024-06-21 15:46:51,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6059, PETRI_PLACES=421, PETRI_TRANSITIONS=456} [2024-06-21 15:46:51,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-21 15:46:51,050 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 456 transitions, 6059 flow [2024-06-21 15:46:51,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:51,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:51,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:51,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 15:46:51,050 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:51,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:51,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1309717274, now seen corresponding path program 16 times [2024-06-21 15:46:51,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:51,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006674812] [2024-06-21 15:46:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:51,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006674812] [2024-06-21 15:46:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006674812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:51,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365913295] [2024-06-21 15:46:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:51,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:51,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 456 transitions, 6059 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:51,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:51,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:51,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:52,210 INFO L124 PetriNetUnfolderBase]: 3179/5290 cut-off events. [2024-06-21 15:46:52,211 INFO L125 PetriNetUnfolderBase]: For 1090988/1091000 co-relation queries the response was YES. [2024-06-21 15:46:52,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50090 conditions, 5290 events. 3179/5290 cut-off events. For 1090988/1091000 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35002 event pairs, 806 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 49900. Up to 4703 conditions per place. [2024-06-21 15:46:52,293 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 77 changer transitions 0/489 dead transitions. [2024-06-21 15:46:52,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 489 transitions, 7169 flow [2024-06-21 15:46:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:46:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:46:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 15:46:52,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-21 15:46:52,294 INFO L175 Difference]: Start difference. First operand has 421 places, 456 transitions, 6059 flow. Second operand 9 states and 209 transitions. [2024-06-21 15:46:52,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 489 transitions, 7169 flow [2024-06-21 15:46:56,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 489 transitions, 7045 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 15:46:56,815 INFO L231 Difference]: Finished difference. Result has 425 places, 457 transitions, 6124 flow [2024-06-21 15:46:56,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=425, PETRI_TRANSITIONS=457} [2024-06-21 15:46:56,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 15:46:56,815 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 457 transitions, 6124 flow [2024-06-21 15:46:56,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:56,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:46:56,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:46:56,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 15:46:56,816 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:46:56,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:46:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1596604604, now seen corresponding path program 17 times [2024-06-21 15:46:56,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:46:56,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36222453] [2024-06-21 15:46:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:46:56,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:46:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:46:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:46:56,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:46:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36222453] [2024-06-21 15:46:56,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36222453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:46:56,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:46:56,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:46:56,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570738647] [2024-06-21 15:46:56,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:46:56,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:46:56,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:46:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:46:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:46:56,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:46:56,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 457 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:46:56,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:46:56,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:46:56,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:46:57,995 INFO L124 PetriNetUnfolderBase]: 3207/5334 cut-off events. [2024-06-21 15:46:57,995 INFO L125 PetriNetUnfolderBase]: For 1107717/1107729 co-relation queries the response was YES. [2024-06-21 15:46:58,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50459 conditions, 5334 events. 3207/5334 cut-off events. For 1107717/1107729 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35393 event pairs, 810 based on Foata normal form. 20/5353 useless extension candidates. Maximal degree in co-relation 50267. Up to 4747 conditions per place. [2024-06-21 15:46:58,079 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 400 selfloop transitions, 81 changer transitions 0/488 dead transitions. [2024-06-21 15:46:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 488 transitions, 7218 flow [2024-06-21 15:46:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:46:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:46:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-21 15:46:58,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-21 15:46:58,080 INFO L175 Difference]: Start difference. First operand has 425 places, 457 transitions, 6124 flow. Second operand 10 states and 224 transitions. [2024-06-21 15:46:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 488 transitions, 7218 flow [2024-06-21 15:47:02,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 488 transitions, 7063 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 15:47:02,934 INFO L231 Difference]: Finished difference. Result has 428 places, 458 transitions, 6158 flow [2024-06-21 15:47:02,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5969, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6158, PETRI_PLACES=428, PETRI_TRANSITIONS=458} [2024-06-21 15:47:02,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 15:47:02,934 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 458 transitions, 6158 flow [2024-06-21 15:47:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:02,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:02,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:02,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 15:47:02,935 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:02,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 300763440, now seen corresponding path program 18 times [2024-06-21 15:47:02,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:02,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076731669] [2024-06-21 15:47:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:02,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:03,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076731669] [2024-06-21 15:47:03,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076731669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:03,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:03,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:03,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170696612] [2024-06-21 15:47:03,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:03,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:03,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:03,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:03,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:03,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 458 transitions, 6158 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:03,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:03,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:03,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:04,141 INFO L124 PetriNetUnfolderBase]: 3227/5371 cut-off events. [2024-06-21 15:47:04,141 INFO L125 PetriNetUnfolderBase]: For 1113044/1113052 co-relation queries the response was YES. [2024-06-21 15:47:04,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50895 conditions, 5371 events. 3227/5371 cut-off events. For 1113044/1113052 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35610 event pairs, 613 based on Foata normal form. 14/5383 useless extension candidates. Maximal degree in co-relation 50702. Up to 3979 conditions per place. [2024-06-21 15:47:04,230 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 393 selfloop transitions, 94 changer transitions 0/494 dead transitions. [2024-06-21 15:47:04,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 494 transitions, 7778 flow [2024-06-21 15:47:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:47:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:47:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:47:04,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 15:47:04,231 INFO L175 Difference]: Start difference. First operand has 428 places, 458 transitions, 6158 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:47:04,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 494 transitions, 7778 flow [2024-06-21 15:47:09,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 494 transitions, 7613 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:47:09,396 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 6213 flow [2024-06-21 15:47:09,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6213, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-21 15:47:09,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 15:47:09,396 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 6213 flow [2024-06-21 15:47:09,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:09,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:09,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:09,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 15:47:09,397 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:09,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash 300883410, now seen corresponding path program 19 times [2024-06-21 15:47:09,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:09,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20004261] [2024-06-21 15:47:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:09,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:09,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:09,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20004261] [2024-06-21 15:47:09,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20004261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:09,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:09,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:09,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823870337] [2024-06-21 15:47:09,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:09,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:09,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:09,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 6213 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:09,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:10,605 INFO L124 PetriNetUnfolderBase]: 3214/5353 cut-off events. [2024-06-21 15:47:10,605 INFO L125 PetriNetUnfolderBase]: For 1092468/1092480 co-relation queries the response was YES. [2024-06-21 15:47:10,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50460 conditions, 5353 events. 3214/5353 cut-off events. For 1092468/1092480 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35488 event pairs, 596 based on Foata normal form. 18/5370 useless extension candidates. Maximal degree in co-relation 50266. Up to 4776 conditions per place. [2024-06-21 15:47:10,690 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 431 selfloop transitions, 46 changer transitions 0/484 dead transitions. [2024-06-21 15:47:10,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 484 transitions, 7245 flow [2024-06-21 15:47:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:47:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:47:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 15:47:10,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 15:47:10,691 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 6213 flow. Second operand 7 states and 165 transitions. [2024-06-21 15:47:10,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 484 transitions, 7245 flow [2024-06-21 15:47:15,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 484 transitions, 6743 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 15:47:15,829 INFO L231 Difference]: Finished difference. Result has 424 places, 459 transitions, 5807 flow [2024-06-21 15:47:15,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5807, PETRI_PLACES=424, PETRI_TRANSITIONS=459} [2024-06-21 15:47:15,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-21 15:47:15,829 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 459 transitions, 5807 flow [2024-06-21 15:47:15,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:15,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:15,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 15:47:15,829 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:15,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 300883596, now seen corresponding path program 13 times [2024-06-21 15:47:15,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:15,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684062205] [2024-06-21 15:47:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:15,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:15,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684062205] [2024-06-21 15:47:15,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684062205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:15,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:15,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594735983] [2024-06-21 15:47:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:15,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:16,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:16,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 459 transitions, 5807 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:16,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:16,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:16,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:17,068 INFO L124 PetriNetUnfolderBase]: 3201/5332 cut-off events. [2024-06-21 15:47:17,068 INFO L125 PetriNetUnfolderBase]: For 1062724/1062736 co-relation queries the response was YES. [2024-06-21 15:47:17,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48196 conditions, 5332 events. 3201/5332 cut-off events. For 1062724/1062736 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35356 event pairs, 576 based on Foata normal form. 18/5349 useless extension candidates. Maximal degree in co-relation 48006. Up to 4410 conditions per place. [2024-06-21 15:47:17,148 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 407 selfloop transitions, 75 changer transitions 0/489 dead transitions. [2024-06-21 15:47:17,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 489 transitions, 7141 flow [2024-06-21 15:47:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:47:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:47:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 15:47:17,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 15:47:17,149 INFO L175 Difference]: Start difference. First operand has 424 places, 459 transitions, 5807 flow. Second operand 8 states and 191 transitions. [2024-06-21 15:47:17,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 489 transitions, 7141 flow [2024-06-21 15:47:21,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 489 transitions, 7029 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 15:47:21,392 INFO L231 Difference]: Finished difference. Result has 426 places, 459 transitions, 5851 flow [2024-06-21 15:47:21,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5851, PETRI_PLACES=426, PETRI_TRANSITIONS=459} [2024-06-21 15:47:21,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 15:47:21,393 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 459 transitions, 5851 flow [2024-06-21 15:47:21,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:21,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:21,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:21,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 15:47:21,393 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:21,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:21,394 INFO L85 PathProgramCache]: Analyzing trace with hash 308292906, now seen corresponding path program 14 times [2024-06-21 15:47:21,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:21,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964820416] [2024-06-21 15:47:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:21,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:21,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:21,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964820416] [2024-06-21 15:47:21,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964820416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:21,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:21,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101338036] [2024-06-21 15:47:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:21,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:21,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:21,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 459 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:21,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:21,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:21,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:22,700 INFO L124 PetriNetUnfolderBase]: 3188/5311 cut-off events. [2024-06-21 15:47:22,701 INFO L125 PetriNetUnfolderBase]: For 1041438/1041450 co-relation queries the response was YES. [2024-06-21 15:47:22,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47627 conditions, 5311 events. 3188/5311 cut-off events. For 1041438/1041450 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35271 event pairs, 757 based on Foata normal form. 18/5326 useless extension candidates. Maximal degree in co-relation 47436. Up to 4674 conditions per place. [2024-06-21 15:47:22,774 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 63 changer transitions 0/485 dead transitions. [2024-06-21 15:47:22,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 485 transitions, 7169 flow [2024-06-21 15:47:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:47:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:47:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:47:22,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:47:22,775 INFO L175 Difference]: Start difference. First operand has 426 places, 459 transitions, 5851 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:47:22,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 485 transitions, 7169 flow [2024-06-21 15:47:26,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6928 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 15:47:26,470 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5742 flow [2024-06-21 15:47:26,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5610, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5742, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-21 15:47:26,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 15:47:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5742 flow [2024-06-21 15:47:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:26,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:26,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 15:47:26,472 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:26,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 566580690, now seen corresponding path program 20 times [2024-06-21 15:47:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:26,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524206553] [2024-06-21 15:47:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:26,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:26,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524206553] [2024-06-21 15:47:26,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524206553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:26,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:26,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:26,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261348991] [2024-06-21 15:47:26,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:26,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:26,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:26,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:26,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:26,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:26,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:26,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:27,690 INFO L124 PetriNetUnfolderBase]: 3175/5294 cut-off events. [2024-06-21 15:47:27,690 INFO L125 PetriNetUnfolderBase]: For 1013312/1013324 co-relation queries the response was YES. [2024-06-21 15:47:27,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46540 conditions, 5294 events. 3175/5294 cut-off events. For 1013312/1013324 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35179 event pairs, 778 based on Foata normal form. 18/5307 useless extension candidates. Maximal degree in co-relation 46349. Up to 4742 conditions per place. [2024-06-21 15:47:27,770 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 40 changer transitions 0/485 dead transitions. [2024-06-21 15:47:27,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 485 transitions, 7054 flow [2024-06-21 15:47:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:47:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:47:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 15:47:27,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 15:47:27,771 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5742 flow. Second operand 8 states and 183 transitions. [2024-06-21 15:47:27,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 485 transitions, 7054 flow [2024-06-21 15:47:31,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6879 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 15:47:31,867 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5651 flow [2024-06-21 15:47:31,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5651, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-21 15:47:31,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 15:47:31,867 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5651 flow [2024-06-21 15:47:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:31,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:31,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:31,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 15:47:31,868 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:31,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash 308302206, now seen corresponding path program 15 times [2024-06-21 15:47:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:31,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675575553] [2024-06-21 15:47:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:32,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:32,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675575553] [2024-06-21 15:47:32,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675575553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:32,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:32,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:32,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913548663] [2024-06-21 15:47:32,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:32,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:32,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:32,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:32,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5651 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:32,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:32,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:33,031 INFO L124 PetriNetUnfolderBase]: 3157/5268 cut-off events. [2024-06-21 15:47:33,031 INFO L125 PetriNetUnfolderBase]: For 983202/983214 co-relation queries the response was YES. [2024-06-21 15:47:33,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45397 conditions, 5268 events. 3157/5268 cut-off events. For 983202/983214 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34994 event pairs, 768 based on Foata normal form. 20/5287 useless extension candidates. Maximal degree in co-relation 45205. Up to 4707 conditions per place. [2024-06-21 15:47:33,112 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 59 changer transitions 0/481 dead transitions. [2024-06-21 15:47:33,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 481 transitions, 6695 flow [2024-06-21 15:47:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:47:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:47:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 15:47:33,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 15:47:33,113 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5651 flow. Second operand 8 states and 184 transitions. [2024-06-21 15:47:33,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 481 transitions, 6695 flow [2024-06-21 15:47:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 481 transitions, 6591 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:47:37,329 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 5673 flow [2024-06-21 15:47:37,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5547, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5673, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-21 15:47:37,329 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 15:47:37,329 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 5673 flow [2024-06-21 15:47:37,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:37,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:37,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:37,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 15:47:37,329 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:37,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 566728560, now seen corresponding path program 21 times [2024-06-21 15:47:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:37,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065606343] [2024-06-21 15:47:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:37,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065606343] [2024-06-21 15:47:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065606343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:37,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:37,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891101197] [2024-06-21 15:47:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:37,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:37,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:37,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 5673 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:37,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:37,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:37,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:38,499 INFO L124 PetriNetUnfolderBase]: 3139/5242 cut-off events. [2024-06-21 15:47:38,500 INFO L125 PetriNetUnfolderBase]: For 939876/939888 co-relation queries the response was YES. [2024-06-21 15:47:38,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44346 conditions, 5242 events. 3139/5242 cut-off events. For 939876/939888 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34829 event pairs, 772 based on Foata normal form. 20/5261 useless extension candidates. Maximal degree in co-relation 44153. Up to 4744 conditions per place. [2024-06-21 15:47:38,579 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 35 changer transitions 0/480 dead transitions. [2024-06-21 15:47:38,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 480 transitions, 6709 flow [2024-06-21 15:47:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:47:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:47:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 15:47:38,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 15:47:38,580 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 5673 flow. Second operand 7 states and 161 transitions. [2024-06-21 15:47:38,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 480 transitions, 6709 flow [2024-06-21 15:47:42,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 480 transitions, 6580 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 15:47:42,743 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 5619 flow [2024-06-21 15:47:42,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5619, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-21 15:47:42,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 15:47:42,744 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 5619 flow [2024-06-21 15:47:42,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:42,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:42,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:42,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 15:47:42,744 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:42,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1022689686, now seen corresponding path program 16 times [2024-06-21 15:47:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:42,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138462016] [2024-06-21 15:47:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:42,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:42,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:42,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138462016] [2024-06-21 15:47:42,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138462016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:42,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:42,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306089155] [2024-06-21 15:47:42,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:42,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:42,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:42,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:42,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 5619 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:42,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:42,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:42,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:43,879 INFO L124 PetriNetUnfolderBase]: 3167/5294 cut-off events. [2024-06-21 15:47:43,879 INFO L125 PetriNetUnfolderBase]: For 955129/955141 co-relation queries the response was YES. [2024-06-21 15:47:43,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44779 conditions, 5294 events. 3167/5294 cut-off events. For 955129/955141 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35256 event pairs, 756 based on Foata normal form. 20/5313 useless extension candidates. Maximal degree in co-relation 44585. Up to 4661 conditions per place. [2024-06-21 15:47:43,959 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 413 selfloop transitions, 61 changer transitions 0/481 dead transitions. [2024-06-21 15:47:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 481 transitions, 6690 flow [2024-06-21 15:47:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:47:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:47:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 15:47:43,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 15:47:43,960 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 5619 flow. Second operand 7 states and 165 transitions. [2024-06-21 15:47:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 481 transitions, 6690 flow [2024-06-21 15:47:48,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 481 transitions, 6621 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 15:47:48,507 INFO L231 Difference]: Finished difference. Result has 429 places, 460 transitions, 5717 flow [2024-06-21 15:47:48,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5717, PETRI_PLACES=429, PETRI_TRANSITIONS=460} [2024-06-21 15:47:48,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 15:47:48,508 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 460 transitions, 5717 flow [2024-06-21 15:47:48,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:48,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:48,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:48,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 15:47:48,508 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:48,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1017506052, now seen corresponding path program 22 times [2024-06-21 15:47:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739985561] [2024-06-21 15:47:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:48,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:48,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:48,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739985561] [2024-06-21 15:47:48,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739985561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:48,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:48,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191132765] [2024-06-21 15:47:48,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:48,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:48,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:48,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 460 transitions, 5717 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:48,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:48,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:48,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:49,773 INFO L124 PetriNetUnfolderBase]: 3149/5260 cut-off events. [2024-06-21 15:47:49,773 INFO L125 PetriNetUnfolderBase]: For 910055/910067 co-relation queries the response was YES. [2024-06-21 15:47:49,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43908 conditions, 5260 events. 3149/5260 cut-off events. For 910055/910067 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35020 event pairs, 756 based on Foata normal form. 20/5279 useless extension candidates. Maximal degree in co-relation 43713. Up to 4584 conditions per place. [2024-06-21 15:47:49,846 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 415 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-21 15:47:49,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 490 transitions, 6797 flow [2024-06-21 15:47:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:47:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:47:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 15:47:49,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 15:47:49,847 INFO L175 Difference]: Start difference. First operand has 429 places, 460 transitions, 5717 flow. Second operand 7 states and 174 transitions. [2024-06-21 15:47:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 490 transitions, 6797 flow [2024-06-21 15:47:53,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 490 transitions, 6657 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 15:47:53,672 INFO L231 Difference]: Finished difference. Result has 429 places, 460 transitions, 5725 flow [2024-06-21 15:47:53,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5725, PETRI_PLACES=429, PETRI_TRANSITIONS=460} [2024-06-21 15:47:53,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 15:47:53,672 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 460 transitions, 5725 flow [2024-06-21 15:47:53,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:53,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:53,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:53,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 15:47:53,673 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:53,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1011964926, now seen corresponding path program 17 times [2024-06-21 15:47:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255958710] [2024-06-21 15:47:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:53,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255958710] [2024-06-21 15:47:53,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255958710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:53,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:53,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:53,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567933606] [2024-06-21 15:47:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:53,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:53,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:53,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:53,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 460 transitions, 5725 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:53,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:53,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:53,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:54,780 INFO L124 PetriNetUnfolderBase]: 3164/5289 cut-off events. [2024-06-21 15:47:54,780 INFO L125 PetriNetUnfolderBase]: For 881490/881502 co-relation queries the response was YES. [2024-06-21 15:47:54,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43664 conditions, 5289 events. 3164/5289 cut-off events. For 881490/881502 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35265 event pairs, 761 based on Foata normal form. 20/5308 useless extension candidates. Maximal degree in co-relation 43470. Up to 4724 conditions per place. [2024-06-21 15:47:54,862 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 417 selfloop transitions, 59 changer transitions 0/483 dead transitions. [2024-06-21 15:47:54,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 483 transitions, 6804 flow [2024-06-21 15:47:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:47:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:47:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 15:47:54,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 15:47:54,863 INFO L175 Difference]: Start difference. First operand has 429 places, 460 transitions, 5725 flow. Second operand 8 states and 183 transitions. [2024-06-21 15:47:54,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 483 transitions, 6804 flow [2024-06-21 15:47:58,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 483 transitions, 6651 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 15:47:58,453 INFO L231 Difference]: Finished difference. Result has 430 places, 461 transitions, 5731 flow [2024-06-21 15:47:58,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5731, PETRI_PLACES=430, PETRI_TRANSITIONS=461} [2024-06-21 15:47:58,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-21 15:47:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 461 transitions, 5731 flow [2024-06-21 15:47:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:58,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:47:58,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:47:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 15:47:58,454 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:47:58,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:47:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1022868432, now seen corresponding path program 23 times [2024-06-21 15:47:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:47:58,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221501769] [2024-06-21 15:47:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:47:58,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:47:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:47:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:47:58,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:47:58,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221501769] [2024-06-21 15:47:58,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221501769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:47:58,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:47:58,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:47:58,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94340536] [2024-06-21 15:47:58,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:47:58,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:47:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:47:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:47:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:47:58,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:47:58,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 461 transitions, 5731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:47:58,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:47:58,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:47:58,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:47:59,607 INFO L124 PetriNetUnfolderBase]: 3146/5263 cut-off events. [2024-06-21 15:47:59,607 INFO L125 PetriNetUnfolderBase]: For 821840/821852 co-relation queries the response was YES. [2024-06-21 15:47:59,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42467 conditions, 5263 events. 3146/5263 cut-off events. For 821840/821852 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35099 event pairs, 753 based on Foata normal form. 20/5282 useless extension candidates. Maximal degree in co-relation 42273. Up to 4565 conditions per place. [2024-06-21 15:47:59,687 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 419 selfloop transitions, 69 changer transitions 0/495 dead transitions. [2024-06-21 15:47:59,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 495 transitions, 6831 flow [2024-06-21 15:47:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:47:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:47:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 15:47:59,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 15:47:59,688 INFO L175 Difference]: Start difference. First operand has 430 places, 461 transitions, 5731 flow. Second operand 8 states and 195 transitions. [2024-06-21 15:47:59,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 495 transitions, 6831 flow [2024-06-21 15:48:03,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 495 transitions, 6696 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 15:48:03,256 INFO L231 Difference]: Finished difference. Result has 431 places, 461 transitions, 5745 flow [2024-06-21 15:48:03,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5745, PETRI_PLACES=431, PETRI_TRANSITIONS=461} [2024-06-21 15:48:03,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 15:48:03,257 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 461 transitions, 5745 flow [2024-06-21 15:48:03,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:03,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:03,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:03,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 15:48:03,257 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:03,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016116, now seen corresponding path program 18 times [2024-06-21 15:48:03,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:03,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118224984] [2024-06-21 15:48:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:03,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118224984] [2024-06-21 15:48:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118224984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:03,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:03,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:03,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247074642] [2024-06-21 15:48:03,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:03,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:03,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:03,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:03,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 461 transitions, 5745 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:03,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:03,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:03,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:04,391 INFO L124 PetriNetUnfolderBase]: 3133/5244 cut-off events. [2024-06-21 15:48:04,391 INFO L125 PetriNetUnfolderBase]: For 761309/761321 co-relation queries the response was YES. [2024-06-21 15:48:04,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41548 conditions, 5244 events. 3133/5244 cut-off events. For 761309/761321 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34972 event pairs, 515 based on Foata normal form. 18/5261 useless extension candidates. Maximal degree in co-relation 41354. Up to 4319 conditions per place. [2024-06-21 15:48:04,470 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 402 selfloop transitions, 79 changer transitions 0/488 dead transitions. [2024-06-21 15:48:04,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 488 transitions, 6837 flow [2024-06-21 15:48:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:48:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:48:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 15:48:04,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 15:48:04,471 INFO L175 Difference]: Start difference. First operand has 431 places, 461 transitions, 5745 flow. Second operand 7 states and 171 transitions. [2024-06-21 15:48:04,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 488 transitions, 6837 flow [2024-06-21 15:48:07,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 488 transitions, 6676 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 15:48:07,713 INFO L231 Difference]: Finished difference. Result has 429 places, 461 transitions, 5756 flow [2024-06-21 15:48:07,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5756, PETRI_PLACES=429, PETRI_TRANSITIONS=461} [2024-06-21 15:48:07,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 15:48:07,713 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 461 transitions, 5756 flow [2024-06-21 15:48:07,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:07,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:07,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:07,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 15:48:07,714 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:07,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016302, now seen corresponding path program 24 times [2024-06-21 15:48:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:07,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670178726] [2024-06-21 15:48:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:07,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670178726] [2024-06-21 15:48:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670178726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:07,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:07,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:07,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157469529] [2024-06-21 15:48:07,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:07,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:07,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:07,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:07,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:07,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 461 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:07,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:07,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:07,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:08,965 INFO L124 PetriNetUnfolderBase]: 3120/5225 cut-off events. [2024-06-21 15:48:08,965 INFO L125 PetriNetUnfolderBase]: For 706864/706876 co-relation queries the response was YES. [2024-06-21 15:48:09,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40728 conditions, 5225 events. 3120/5225 cut-off events. For 706864/706876 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34966 event pairs, 510 based on Foata normal form. 18/5242 useless extension candidates. Maximal degree in co-relation 40535. Up to 4200 conditions per place. [2024-06-21 15:48:09,037 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 86 changer transitions 0/498 dead transitions. [2024-06-21 15:48:09,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 498 transitions, 6886 flow [2024-06-21 15:48:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:48:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:48:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 15:48:09,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 15:48:09,038 INFO L175 Difference]: Start difference. First operand has 429 places, 461 transitions, 5756 flow. Second operand 8 states and 198 transitions. [2024-06-21 15:48:09,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 498 transitions, 6886 flow [2024-06-21 15:48:12,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 498 transitions, 6706 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 15:48:12,023 INFO L231 Difference]: Finished difference. Result has 429 places, 461 transitions, 5756 flow [2024-06-21 15:48:12,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5756, PETRI_PLACES=429, PETRI_TRANSITIONS=461} [2024-06-21 15:48:12,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 15:48:12,024 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 461 transitions, 5756 flow [2024-06-21 15:48:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:12,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:12,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:12,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 15:48:12,024 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:12,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1513914430, now seen corresponding path program 19 times [2024-06-21 15:48:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:12,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851447237] [2024-06-21 15:48:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:12,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:12,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851447237] [2024-06-21 15:48:12,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851447237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:12,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:12,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:12,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581115893] [2024-06-21 15:48:12,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:12,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:12,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:12,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:12,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:12,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 461 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:12,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:12,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:12,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:13,129 INFO L124 PetriNetUnfolderBase]: 3148/5266 cut-off events. [2024-06-21 15:48:13,129 INFO L125 PetriNetUnfolderBase]: For 700484/700492 co-relation queries the response was YES. [2024-06-21 15:48:13,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40846 conditions, 5266 events. 3148/5266 cut-off events. For 700484/700492 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 35179 event pairs, 777 based on Foata normal form. 13/5277 useless extension candidates. Maximal degree in co-relation 40655. Up to 4700 conditions per place. [2024-06-21 15:48:13,208 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 392 selfloop transitions, 78 changer transitions 0/477 dead transitions. [2024-06-21 15:48:13,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 477 transitions, 6805 flow [2024-06-21 15:48:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:48:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:48:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-21 15:48:13,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-21 15:48:13,209 INFO L175 Difference]: Start difference. First operand has 429 places, 461 transitions, 5756 flow. Second operand 7 states and 157 transitions. [2024-06-21 15:48:13,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 477 transitions, 6805 flow [2024-06-21 15:48:16,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 477 transitions, 6621 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 15:48:16,157 INFO L231 Difference]: Finished difference. Result has 427 places, 462 transitions, 5766 flow [2024-06-21 15:48:16,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5766, PETRI_PLACES=427, PETRI_TRANSITIONS=462} [2024-06-21 15:48:16,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 15:48:16,157 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 462 transitions, 5766 flow [2024-06-21 15:48:16,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:16,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:16,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:16,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 15:48:16,158 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:16,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:16,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1061636138, now seen corresponding path program 20 times [2024-06-21 15:48:16,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:16,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975793472] [2024-06-21 15:48:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:16,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:16,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975793472] [2024-06-21 15:48:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975793472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:16,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:16,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:16,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614934504] [2024-06-21 15:48:16,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:16,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:16,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 462 transitions, 5766 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:16,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:16,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:16,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:17,287 INFO L124 PetriNetUnfolderBase]: 3209/5368 cut-off events. [2024-06-21 15:48:17,287 INFO L125 PetriNetUnfolderBase]: For 732359/732371 co-relation queries the response was YES. [2024-06-21 15:48:17,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42121 conditions, 5368 events. 3209/5368 cut-off events. For 732359/732371 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 35842 event pairs, 752 based on Foata normal form. 20/5387 useless extension candidates. Maximal degree in co-relation 41931. Up to 4461 conditions per place. [2024-06-21 15:48:17,369 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 395 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-21 15:48:17,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 492 transitions, 7186 flow [2024-06-21 15:48:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 15:48:17,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 15:48:17,370 INFO L175 Difference]: Start difference. First operand has 427 places, 462 transitions, 5766 flow. Second operand 9 states and 204 transitions. [2024-06-21 15:48:17,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 492 transitions, 7186 flow [2024-06-21 15:48:20,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 492 transitions, 7019 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:48:20,364 INFO L231 Difference]: Finished difference. Result has 432 places, 464 transitions, 5877 flow [2024-06-21 15:48:20,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5877, PETRI_PLACES=432, PETRI_TRANSITIONS=464} [2024-06-21 15:48:20,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-21 15:48:20,364 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 464 transitions, 5877 flow [2024-06-21 15:48:20,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:20,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:20,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:20,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 15:48:20,364 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:20,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1516771390, now seen corresponding path program 21 times [2024-06-21 15:48:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594550734] [2024-06-21 15:48:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:20,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:20,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594550734] [2024-06-21 15:48:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594550734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:20,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:20,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:20,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420774205] [2024-06-21 15:48:20,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:20,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:20,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:20,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:20,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 464 transitions, 5877 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:20,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:20,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:20,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:21,526 INFO L124 PetriNetUnfolderBase]: 3224/5394 cut-off events. [2024-06-21 15:48:21,526 INFO L125 PetriNetUnfolderBase]: For 732723/732731 co-relation queries the response was YES. [2024-06-21 15:48:21,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42457 conditions, 5394 events. 3224/5394 cut-off events. For 732723/732731 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 36217 event pairs, 795 based on Foata normal form. 13/5405 useless extension candidates. Maximal degree in co-relation 42265. Up to 4712 conditions per place. [2024-06-21 15:48:21,603 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 397 selfloop transitions, 80 changer transitions 0/484 dead transitions. [2024-06-21 15:48:21,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 484 transitions, 6992 flow [2024-06-21 15:48:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:48:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:48:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:48:21,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:48:21,604 INFO L175 Difference]: Start difference. First operand has 432 places, 464 transitions, 5877 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:48:21,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 484 transitions, 6992 flow [2024-06-21 15:48:24,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 484 transitions, 6826 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 15:48:24,670 INFO L231 Difference]: Finished difference. Result has 432 places, 465 transitions, 5908 flow [2024-06-21 15:48:24,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5908, PETRI_PLACES=432, PETRI_TRANSITIONS=465} [2024-06-21 15:48:24,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-21 15:48:24,670 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 465 transitions, 5908 flow [2024-06-21 15:48:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:24,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:24,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:24,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 15:48:24,670 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:24,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash 836591948, now seen corresponding path program 22 times [2024-06-21 15:48:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:24,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192066551] [2024-06-21 15:48:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:24,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:24,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:24,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192066551] [2024-06-21 15:48:24,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192066551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:24,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:24,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:24,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349181090] [2024-06-21 15:48:24,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:24,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:24,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:24,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 465 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:24,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:24,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:24,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:25,832 INFO L124 PetriNetUnfolderBase]: 3252/5441 cut-off events. [2024-06-21 15:48:25,832 INFO L125 PetriNetUnfolderBase]: For 733298/733310 co-relation queries the response was YES. [2024-06-21 15:48:25,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42737 conditions, 5441 events. 3252/5441 cut-off events. For 733298/733310 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36574 event pairs, 793 based on Foata normal form. 20/5460 useless extension candidates. Maximal degree in co-relation 42545. Up to 4800 conditions per place. [2024-06-21 15:48:25,917 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 397 selfloop transitions, 89 changer transitions 0/493 dead transitions. [2024-06-21 15:48:25,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 493 transitions, 7021 flow [2024-06-21 15:48:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:48:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:48:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-21 15:48:25,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-21 15:48:25,918 INFO L175 Difference]: Start difference. First operand has 432 places, 465 transitions, 5908 flow. Second operand 10 states and 221 transitions. [2024-06-21 15:48:25,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 493 transitions, 7021 flow [2024-06-21 15:48:29,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 493 transitions, 6849 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:48:29,222 INFO L231 Difference]: Finished difference. Result has 437 places, 466 transitions, 5960 flow [2024-06-21 15:48:29,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5960, PETRI_PLACES=437, PETRI_TRANSITIONS=466} [2024-06-21 15:48:29,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-21 15:48:29,222 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 466 transitions, 5960 flow [2024-06-21 15:48:29,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:29,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:29,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 15:48:29,223 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:29,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash 836413202, now seen corresponding path program 25 times [2024-06-21 15:48:29,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:29,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779155721] [2024-06-21 15:48:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779155721] [2024-06-21 15:48:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779155721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:29,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:29,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319536508] [2024-06-21 15:48:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:29,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:29,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 466 transitions, 5960 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:30,403 INFO L124 PetriNetUnfolderBase]: 3234/5415 cut-off events. [2024-06-21 15:48:30,403 INFO L125 PetriNetUnfolderBase]: For 687566/687578 co-relation queries the response was YES. [2024-06-21 15:48:30,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41686 conditions, 5415 events. 3234/5415 cut-off events. For 687566/687578 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36539 event pairs, 771 based on Foata normal form. 20/5434 useless extension candidates. Maximal degree in co-relation 41493. Up to 4641 conditions per place. [2024-06-21 15:48:30,487 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 93 changer transitions 0/504 dead transitions. [2024-06-21 15:48:30,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 504 transitions, 7088 flow [2024-06-21 15:48:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 15:48:30,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 15:48:30,488 INFO L175 Difference]: Start difference. First operand has 437 places, 466 transitions, 5960 flow. Second operand 9 states and 217 transitions. [2024-06-21 15:48:30,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 504 transitions, 7088 flow [2024-06-21 15:48:33,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 504 transitions, 6895 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 15:48:33,587 INFO L231 Difference]: Finished difference. Result has 436 places, 466 transitions, 5967 flow [2024-06-21 15:48:33,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=436, PETRI_TRANSITIONS=466} [2024-06-21 15:48:33,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 15:48:33,587 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 466 transitions, 5967 flow [2024-06-21 15:48:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:33,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:33,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:33,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 15:48:33,587 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:33,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 749573708, now seen corresponding path program 23 times [2024-06-21 15:48:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:33,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767733471] [2024-06-21 15:48:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:33,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767733471] [2024-06-21 15:48:33,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767733471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:33,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:33,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:33,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768791907] [2024-06-21 15:48:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:33,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:33,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:33,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:33,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 466 transitions, 5967 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:33,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:33,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:33,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:34,725 INFO L124 PetriNetUnfolderBase]: 3221/5383 cut-off events. [2024-06-21 15:48:34,725 INFO L125 PetriNetUnfolderBase]: For 619062/619074 co-relation queries the response was YES. [2024-06-21 15:48:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40715 conditions, 5383 events. 3221/5383 cut-off events. For 619062/619074 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36132 event pairs, 741 based on Foata normal form. 18/5387 useless extension candidates. Maximal degree in co-relation 40523. Up to 4501 conditions per place. [2024-06-21 15:48:34,806 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 105 changer transitions 0/500 dead transitions. [2024-06-21 15:48:34,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 500 transitions, 7337 flow [2024-06-21 15:48:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:48:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:48:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-21 15:48:34,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-21 15:48:34,807 INFO L175 Difference]: Start difference. First operand has 436 places, 466 transitions, 5967 flow. Second operand 10 states and 228 transitions. [2024-06-21 15:48:34,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 500 transitions, 7337 flow [2024-06-21 15:48:37,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 500 transitions, 7125 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 15:48:37,414 INFO L231 Difference]: Finished difference. Result has 435 places, 466 transitions, 5981 flow [2024-06-21 15:48:37,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5981, PETRI_PLACES=435, PETRI_TRANSITIONS=466} [2024-06-21 15:48:37,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 15:48:37,415 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 466 transitions, 5981 flow [2024-06-21 15:48:37,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:37,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:37,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 15:48:37,415 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:37,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 836265332, now seen corresponding path program 26 times [2024-06-21 15:48:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713562376] [2024-06-21 15:48:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713562376] [2024-06-21 15:48:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713562376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:37,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:37,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779163924] [2024-06-21 15:48:37,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:37,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:37,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:37,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 466 transitions, 5981 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:37,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:37,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:38,734 INFO L124 PetriNetUnfolderBase]: 3208/5371 cut-off events. [2024-06-21 15:48:38,734 INFO L125 PetriNetUnfolderBase]: For 561990/562002 co-relation queries the response was YES. [2024-06-21 15:48:38,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39825 conditions, 5371 events. 3208/5371 cut-off events. For 561990/562002 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36214 event pairs, 706 based on Foata normal form. 18/5382 useless extension candidates. Maximal degree in co-relation 39635. Up to 4426 conditions per place. [2024-06-21 15:48:38,805 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 399 selfloop transitions, 105 changer transitions 0/511 dead transitions. [2024-06-21 15:48:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 511 transitions, 7157 flow [2024-06-21 15:48:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:48:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:48:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-21 15:48:38,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-21 15:48:38,806 INFO L175 Difference]: Start difference. First operand has 435 places, 466 transitions, 5981 flow. Second operand 10 states and 241 transitions. [2024-06-21 15:48:38,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 511 transitions, 7157 flow [2024-06-21 15:48:41,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 511 transitions, 6925 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 15:48:41,433 INFO L231 Difference]: Finished difference. Result has 434 places, 466 transitions, 5969 flow [2024-06-21 15:48:41,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5969, PETRI_PLACES=434, PETRI_TRANSITIONS=466} [2024-06-21 15:48:41,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 15:48:41,433 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 466 transitions, 5969 flow [2024-06-21 15:48:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:41,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:41,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:41,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 15:48:41,433 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:41,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1064493098, now seen corresponding path program 24 times [2024-06-21 15:48:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:41,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311797605] [2024-06-21 15:48:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:41,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:41,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311797605] [2024-06-21 15:48:41,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311797605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:41,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:41,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961029064] [2024-06-21 15:48:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:41,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:41,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:41,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 466 transitions, 5969 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:41,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:41,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:41,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:42,513 INFO L124 PetriNetUnfolderBase]: 3190/5351 cut-off events. [2024-06-21 15:48:42,513 INFO L125 PetriNetUnfolderBase]: For 503033/503045 co-relation queries the response was YES. [2024-06-21 15:48:42,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38336 conditions, 5351 events. 3190/5351 cut-off events. For 503033/503045 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36071 event pairs, 763 based on Foata normal form. 20/5370 useless extension candidates. Maximal degree in co-relation 38149. Up to 4742 conditions per place. [2024-06-21 15:48:42,591 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 398 selfloop transitions, 84 changer transitions 0/489 dead transitions. [2024-06-21 15:48:42,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 489 transitions, 7031 flow [2024-06-21 15:48:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 15:48:42,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 15:48:42,592 INFO L175 Difference]: Start difference. First operand has 434 places, 466 transitions, 5969 flow. Second operand 9 states and 200 transitions. [2024-06-21 15:48:42,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 489 transitions, 7031 flow [2024-06-21 15:48:45,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 489 transitions, 6791 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 15:48:45,070 INFO L231 Difference]: Finished difference. Result has 431 places, 466 transitions, 5905 flow [2024-06-21 15:48:45,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5905, PETRI_PLACES=431, PETRI_TRANSITIONS=466} [2024-06-21 15:48:45,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 15:48:45,070 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 466 transitions, 5905 flow [2024-06-21 15:48:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:45,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:45,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:45,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 15:48:45,070 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:45,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash 747699758, now seen corresponding path program 25 times [2024-06-21 15:48:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:45,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793614927] [2024-06-21 15:48:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793614927] [2024-06-21 15:48:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793614927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:45,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:45,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:45,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94898875] [2024-06-21 15:48:45,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:45,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:45,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:45,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:45,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 466 transitions, 5905 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:45,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:45,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:46,188 INFO L124 PetriNetUnfolderBase]: 3210/5383 cut-off events. [2024-06-21 15:48:46,189 INFO L125 PetriNetUnfolderBase]: For 474384/474396 co-relation queries the response was YES. [2024-06-21 15:48:46,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38204 conditions, 5383 events. 3210/5383 cut-off events. For 474384/474396 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36148 event pairs, 484 based on Foata normal form. 18/5400 useless extension candidates. Maximal degree in co-relation 38019. Up to 3690 conditions per place. [2024-06-21 15:48:46,266 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 363 selfloop transitions, 134 changer transitions 0/504 dead transitions. [2024-06-21 15:48:46,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 504 transitions, 7354 flow [2024-06-21 15:48:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-21 15:48:46,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-21 15:48:46,267 INFO L175 Difference]: Start difference. First operand has 431 places, 466 transitions, 5905 flow. Second operand 9 states and 214 transitions. [2024-06-21 15:48:46,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 504 transitions, 7354 flow [2024-06-21 15:48:48,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 504 transitions, 7119 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 15:48:48,508 INFO L231 Difference]: Finished difference. Result has 429 places, 467 transitions, 5983 flow [2024-06-21 15:48:48,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5672, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5983, PETRI_PLACES=429, PETRI_TRANSITIONS=467} [2024-06-21 15:48:48,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 15:48:48,509 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 467 transitions, 5983 flow [2024-06-21 15:48:48,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:48,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:48,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:48,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 15:48:48,509 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:48,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash 747699572, now seen corresponding path program 27 times [2024-06-21 15:48:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:48,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695834361] [2024-06-21 15:48:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:48,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:48,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695834361] [2024-06-21 15:48:48,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695834361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:48,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:48,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:48,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458094701] [2024-06-21 15:48:48,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:48,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:48,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:48,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:48,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 467 transitions, 5983 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:48,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:48,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:48,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:49,680 INFO L124 PetriNetUnfolderBase]: 3197/5364 cut-off events. [2024-06-21 15:48:49,680 INFO L125 PetriNetUnfolderBase]: For 438093/438105 co-relation queries the response was YES. [2024-06-21 15:48:49,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37854 conditions, 5364 events. 3197/5364 cut-off events. For 438093/438105 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36115 event pairs, 460 based on Foata normal form. 18/5381 useless extension candidates. Maximal degree in co-relation 37670. Up to 3774 conditions per place. [2024-06-21 15:48:49,757 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 124 changer transitions 0/509 dead transitions. [2024-06-21 15:48:49,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 509 transitions, 7147 flow [2024-06-21 15:48:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 15:48:49,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 15:48:49,758 INFO L175 Difference]: Start difference. First operand has 429 places, 467 transitions, 5983 flow. Second operand 9 states and 220 transitions. [2024-06-21 15:48:49,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 509 transitions, 7147 flow [2024-06-21 15:48:51,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 509 transitions, 6878 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 15:48:51,947 INFO L231 Difference]: Finished difference. Result has 429 places, 467 transitions, 5970 flow [2024-06-21 15:48:51,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5970, PETRI_PLACES=429, PETRI_TRANSITIONS=467} [2024-06-21 15:48:51,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 15:48:51,948 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 467 transitions, 5970 flow [2024-06-21 15:48:51,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:51,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:51,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:51,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 15:48:51,948 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:51,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2128502784, now seen corresponding path program 26 times [2024-06-21 15:48:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608505281] [2024-06-21 15:48:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:52,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:52,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608505281] [2024-06-21 15:48:52,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608505281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:52,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:52,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788989536] [2024-06-21 15:48:52,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:52,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:52,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 467 transitions, 5970 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:52,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:52,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:52,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:53,029 INFO L124 PetriNetUnfolderBase]: 3184/5345 cut-off events. [2024-06-21 15:48:53,029 INFO L125 PetriNetUnfolderBase]: For 385350/385362 co-relation queries the response was YES. [2024-06-21 15:48:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 5345 events. 3184/5345 cut-off events. For 385350/385362 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 35937 event pairs, 481 based on Foata normal form. 18/5362 useless extension candidates. Maximal degree in co-relation 36577. Up to 3665 conditions per place. [2024-06-21 15:48:53,106 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 355 selfloop transitions, 137 changer transitions 0/499 dead transitions. [2024-06-21 15:48:53,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 499 transitions, 7116 flow [2024-06-21 15:48:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 15:48:53,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 15:48:53,106 INFO L175 Difference]: Start difference. First operand has 429 places, 467 transitions, 5970 flow. Second operand 9 states and 208 transitions. [2024-06-21 15:48:53,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 499 transitions, 7116 flow [2024-06-21 15:48:55,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 499 transitions, 6810 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 15:48:55,085 INFO L231 Difference]: Finished difference. Result has 428 places, 467 transitions, 5946 flow [2024-06-21 15:48:55,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5946, PETRI_PLACES=428, PETRI_TRANSITIONS=467} [2024-06-21 15:48:55,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 15:48:55,085 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 467 transitions, 5946 flow [2024-06-21 15:48:55,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:55,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:55,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:48:55,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 15:48:55,086 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:55,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1507955516, now seen corresponding path program 1 times [2024-06-21 15:48:55,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:55,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335610816] [2024-06-21 15:48:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:55,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:55,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335610816] [2024-06-21 15:48:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335610816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601599025] [2024-06-21 15:48:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:55,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:55,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:55,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 467 transitions, 5946 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:55,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:55,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:55,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:56,234 INFO L124 PetriNetUnfolderBase]: 3204/5381 cut-off events. [2024-06-21 15:48:56,234 INFO L125 PetriNetUnfolderBase]: For 380556/380568 co-relation queries the response was YES. [2024-06-21 15:48:56,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36962 conditions, 5381 events. 3204/5381 cut-off events. For 380556/380568 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 36360 event pairs, 704 based on Foata normal form. 18/5398 useless extension candidates. Maximal degree in co-relation 36780. Up to 4077 conditions per place. [2024-06-21 15:48:56,307 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 408 selfloop transitions, 95 changer transitions 0/510 dead transitions. [2024-06-21 15:48:56,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 510 transitions, 7376 flow [2024-06-21 15:48:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 15:48:56,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-21 15:48:56,308 INFO L175 Difference]: Start difference. First operand has 428 places, 467 transitions, 5946 flow. Second operand 9 states and 218 transitions. [2024-06-21 15:48:56,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 510 transitions, 7376 flow [2024-06-21 15:48:58,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 510 transitions, 7063 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 15:48:58,392 INFO L231 Difference]: Finished difference. Result has 427 places, 468 transitions, 5851 flow [2024-06-21 15:48:58,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5851, PETRI_PLACES=427, PETRI_TRANSITIONS=468} [2024-06-21 15:48:58,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 15:48:58,392 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 468 transitions, 5851 flow [2024-06-21 15:48:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:58,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:48:58,392 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, 1] [2024-06-21 15:48:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 15:48:58,393 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:48:58,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:48:58,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254418, now seen corresponding path program 1 times [2024-06-21 15:48:58,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:48:58,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266347860] [2024-06-21 15:48:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:48:58,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:48:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:48:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:48:58,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:48:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266347860] [2024-06-21 15:48:58,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266347860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:48:58,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:48:58,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:48:58,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80913470] [2024-06-21 15:48:58,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:48:58,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:48:58,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:48:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:48:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:48:58,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:48:58,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 468 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:48:58,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:48:58,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:48:58,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:48:59,504 INFO L124 PetriNetUnfolderBase]: 3311/5558 cut-off events. [2024-06-21 15:48:59,504 INFO L125 PetriNetUnfolderBase]: For 421210/421222 co-relation queries the response was YES. [2024-06-21 15:48:59,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 5558 events. 3311/5558 cut-off events. For 421210/421222 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 37693 event pairs, 742 based on Foata normal form. 18/5575 useless extension candidates. Maximal degree in co-relation 38242. Up to 4675 conditions per place. [2024-06-21 15:48:59,585 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 81 changer transitions 0/506 dead transitions. [2024-06-21 15:48:59,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 506 transitions, 7312 flow [2024-06-21 15:48:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:48:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:48:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 15:48:59,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-21 15:48:59,586 INFO L175 Difference]: Start difference. First operand has 427 places, 468 transitions, 5851 flow. Second operand 9 states and 206 transitions. [2024-06-21 15:48:59,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 506 transitions, 7312 flow [2024-06-21 15:49:01,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 506 transitions, 7023 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 15:49:01,587 INFO L231 Difference]: Finished difference. Result has 431 places, 476 transitions, 5890 flow [2024-06-21 15:49:01,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5890, PETRI_PLACES=431, PETRI_TRANSITIONS=476} [2024-06-21 15:49:01,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 15:49:01,587 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 476 transitions, 5890 flow [2024-06-21 15:49:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:01,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:01,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:01,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 15:49:01,588 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:01,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254046, now seen corresponding path program 2 times [2024-06-21 15:49:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:01,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523697126] [2024-06-21 15:49:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:01,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:01,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523697126] [2024-06-21 15:49:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523697126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:01,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:01,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500779582] [2024-06-21 15:49:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:01,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:01,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 476 transitions, 5890 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:01,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:01,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:01,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:02,734 INFO L124 PetriNetUnfolderBase]: 3331/5592 cut-off events. [2024-06-21 15:49:02,735 INFO L125 PetriNetUnfolderBase]: For 428126/428138 co-relation queries the response was YES. [2024-06-21 15:49:02,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38159 conditions, 5592 events. 3331/5592 cut-off events. For 428126/428138 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 38019 event pairs, 717 based on Foata normal form. 18/5609 useless extension candidates. Maximal degree in co-relation 37976. Up to 4203 conditions per place. [2024-06-21 15:49:02,813 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 410 selfloop transitions, 100 changer transitions 0/517 dead transitions. [2024-06-21 15:49:02,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 517 transitions, 7339 flow [2024-06-21 15:49:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:49:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:49:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 15:49:02,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-21 15:49:02,814 INFO L175 Difference]: Start difference. First operand has 431 places, 476 transitions, 5890 flow. Second operand 9 states and 217 transitions. [2024-06-21 15:49:02,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 517 transitions, 7339 flow [2024-06-21 15:49:04,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 517 transitions, 7183 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 15:49:04,811 INFO L231 Difference]: Finished difference. Result has 434 places, 477 transitions, 5954 flow [2024-06-21 15:49:04,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5954, PETRI_PLACES=434, PETRI_TRANSITIONS=477} [2024-06-21 15:49:04,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 15:49:04,811 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 477 transitions, 5954 flow [2024-06-21 15:49:04,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:04,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:04,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:04,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 15:49:04,812 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:04,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1596968048, now seen corresponding path program 2 times [2024-06-21 15:49:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818966081] [2024-06-21 15:49:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818966081] [2024-06-21 15:49:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818966081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:04,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463838212] [2024-06-21 15:49:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:04,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:04,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:04,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 477 transitions, 5954 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:04,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:04,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:04,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:06,023 INFO L124 PetriNetUnfolderBase]: 3359/5638 cut-off events. [2024-06-21 15:49:06,023 INFO L125 PetriNetUnfolderBase]: For 441487/441499 co-relation queries the response was YES. [2024-06-21 15:49:06,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38666 conditions, 5638 events. 3359/5638 cut-off events. For 441487/441499 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 38393 event pairs, 812 based on Foata normal form. 20/5657 useless extension candidates. Maximal degree in co-relation 38483. Up to 5032 conditions per place. [2024-06-21 15:49:06,103 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 67 changer transitions 0/498 dead transitions. [2024-06-21 15:49:06,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 498 transitions, 7049 flow [2024-06-21 15:49:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:49:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:49:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 15:49:06,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 15:49:06,104 INFO L175 Difference]: Start difference. First operand has 434 places, 477 transitions, 5954 flow. Second operand 9 states and 199 transitions. [2024-06-21 15:49:06,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 498 transitions, 7049 flow [2024-06-21 15:49:08,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 498 transitions, 6893 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 15:49:08,094 INFO L231 Difference]: Finished difference. Result has 437 places, 478 transitions, 5969 flow [2024-06-21 15:49:08,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5969, PETRI_PLACES=437, PETRI_TRANSITIONS=478} [2024-06-21 15:49:08,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-21 15:49:08,095 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 478 transitions, 5969 flow [2024-06-21 15:49:08,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:08,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:08,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 15:49:08,095 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:08,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1510128368, now seen corresponding path program 3 times [2024-06-21 15:49:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:08,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251765883] [2024-06-21 15:49:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:08,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:08,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251765883] [2024-06-21 15:49:08,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251765883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:08,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:08,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:08,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115624112] [2024-06-21 15:49:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:08,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:08,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:08,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:08,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 478 transitions, 5969 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:08,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:08,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:08,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:09,257 INFO L124 PetriNetUnfolderBase]: 3379/5668 cut-off events. [2024-06-21 15:49:09,258 INFO L125 PetriNetUnfolderBase]: For 438828/438840 co-relation queries the response was YES. [2024-06-21 15:49:09,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38831 conditions, 5668 events. 3379/5668 cut-off events. For 438828/438840 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38660 event pairs, 800 based on Foata normal form. 18/5685 useless extension candidates. Maximal degree in co-relation 38647. Up to 5004 conditions per place. [2024-06-21 15:49:09,338 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 73 changer transitions 0/504 dead transitions. [2024-06-21 15:49:09,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 504 transitions, 7116 flow [2024-06-21 15:49:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:49:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:49:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 15:49:09,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:49:09,339 INFO L175 Difference]: Start difference. First operand has 437 places, 478 transitions, 5969 flow. Second operand 10 states and 220 transitions. [2024-06-21 15:49:09,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 504 transitions, 7116 flow [2024-06-21 15:49:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 504 transitions, 6976 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 15:49:11,455 INFO L231 Difference]: Finished difference. Result has 441 places, 480 transitions, 6034 flow [2024-06-21 15:49:11,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6034, PETRI_PLACES=441, PETRI_TRANSITIONS=480} [2024-06-21 15:49:11,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-21 15:49:11,455 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 480 transitions, 6034 flow [2024-06-21 15:49:11,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:11,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:11,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:11,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 15:49:11,456 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:11,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1596819806, now seen corresponding path program 3 times [2024-06-21 15:49:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:11,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265809086] [2024-06-21 15:49:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:11,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:11,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265809086] [2024-06-21 15:49:11,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265809086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:11,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:11,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987795757] [2024-06-21 15:49:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:11,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:11,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 480 transitions, 6034 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:11,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:11,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:11,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:12,629 INFO L124 PetriNetUnfolderBase]: 3399/5702 cut-off events. [2024-06-21 15:49:12,630 INFO L125 PetriNetUnfolderBase]: For 445513/445525 co-relation queries the response was YES. [2024-06-21 15:49:12,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39111 conditions, 5702 events. 3399/5702 cut-off events. For 445513/445525 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 38918 event pairs, 812 based on Foata normal form. 18/5715 useless extension candidates. Maximal degree in co-relation 38925. Up to 4967 conditions per place. [2024-06-21 15:49:12,712 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 89 changer transitions 0/514 dead transitions. [2024-06-21 15:49:12,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 514 transitions, 7202 flow [2024-06-21 15:49:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:49:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:49:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-21 15:49:12,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-21 15:49:12,713 INFO L175 Difference]: Start difference. First operand has 441 places, 480 transitions, 6034 flow. Second operand 10 states and 227 transitions. [2024-06-21 15:49:12,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 514 transitions, 7202 flow [2024-06-21 15:49:14,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 514 transitions, 7048 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 15:49:14,634 INFO L231 Difference]: Finished difference. Result has 443 places, 481 transitions, 6079 flow [2024-06-21 15:49:14,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5880, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6079, PETRI_PLACES=443, PETRI_TRANSITIONS=481} [2024-06-21 15:49:14,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 15:49:14,635 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 481 transitions, 6079 flow [2024-06-21 15:49:14,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:14,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:14,635 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, 1] [2024-06-21 15:49:14,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 15:49:14,635 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:14,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1011780228, now seen corresponding path program 4 times [2024-06-21 15:49:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:14,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469417494] [2024-06-21 15:49:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:14,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469417494] [2024-06-21 15:49:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469417494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:14,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51403659] [2024-06-21 15:49:14,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:14,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:14,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:14,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 481 transitions, 6079 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:14,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:14,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:14,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:15,924 INFO L124 PetriNetUnfolderBase]: 3427/5750 cut-off events. [2024-06-21 15:49:15,924 INFO L125 PetriNetUnfolderBase]: For 459955/459967 co-relation queries the response was YES. [2024-06-21 15:49:15,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39520 conditions, 5750 events. 3427/5750 cut-off events. For 459955/459967 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 39343 event pairs, 826 based on Foata normal form. 20/5769 useless extension candidates. Maximal degree in co-relation 39334. Up to 5171 conditions per place. [2024-06-21 15:49:15,998 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 446 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-21 15:49:15,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 501 transitions, 7182 flow [2024-06-21 15:49:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:49:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:49:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 15:49:15,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 15:49:15,999 INFO L175 Difference]: Start difference. First operand has 443 places, 481 transitions, 6079 flow. Second operand 8 states and 180 transitions. [2024-06-21 15:49:15,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 501 transitions, 7182 flow [2024-06-21 15:49:18,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 501 transitions, 7003 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:49:18,366 INFO L231 Difference]: Finished difference. Result has 443 places, 482 transitions, 6037 flow [2024-06-21 15:49:18,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5900, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6037, PETRI_PLACES=443, PETRI_TRANSITIONS=482} [2024-06-21 15:49:18,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 15:49:18,366 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 482 transitions, 6037 flow [2024-06-21 15:49:18,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:18,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:18,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:18,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 15:49:18,367 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:18,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1017142608, now seen corresponding path program 5 times [2024-06-21 15:49:18,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:18,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367342420] [2024-06-21 15:49:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:18,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367342420] [2024-06-21 15:49:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367342420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726549435] [2024-06-21 15:49:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:18,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:18,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 482 transitions, 6037 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:18,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:18,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:18,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:19,563 INFO L124 PetriNetUnfolderBase]: 3455/5798 cut-off events. [2024-06-21 15:49:19,563 INFO L125 PetriNetUnfolderBase]: For 467193/467205 co-relation queries the response was YES. [2024-06-21 15:49:19,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39895 conditions, 5798 events. 3455/5798 cut-off events. For 467193/467205 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 39693 event pairs, 832 based on Foata normal form. 20/5817 useless extension candidates. Maximal degree in co-relation 39708. Up to 5215 conditions per place. [2024-06-21 15:49:19,654 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 446 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-21 15:49:19,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 501 transitions, 7140 flow [2024-06-21 15:49:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:49:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:49:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:49:19,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 15:49:19,655 INFO L175 Difference]: Start difference. First operand has 443 places, 482 transitions, 6037 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:49:19,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 501 transitions, 7140 flow [2024-06-21 15:49:21,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 501 transitions, 7034 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 15:49:21,861 INFO L231 Difference]: Finished difference. Result has 444 places, 483 transitions, 6070 flow [2024-06-21 15:49:21,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6070, PETRI_PLACES=444, PETRI_TRANSITIONS=483} [2024-06-21 15:49:21,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-21 15:49:21,861 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 483 transitions, 6070 flow [2024-06-21 15:49:21,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:21,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:21,861 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, 1] [2024-06-21 15:49:21,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 15:49:21,861 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:21,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:21,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290478, now seen corresponding path program 6 times [2024-06-21 15:49:21,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:21,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896188130] [2024-06-21 15:49:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:21,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:21,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896188130] [2024-06-21 15:49:21,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896188130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:21,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:21,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:21,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699420388] [2024-06-21 15:49:21,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:21,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:22,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:22,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 483 transitions, 6070 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:22,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:22,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:22,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:23,102 INFO L124 PetriNetUnfolderBase]: 3500/5869 cut-off events. [2024-06-21 15:49:23,102 INFO L125 PetriNetUnfolderBase]: For 463259/463271 co-relation queries the response was YES. [2024-06-21 15:49:23,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40412 conditions, 5869 events. 3500/5869 cut-off events. For 463259/463271 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40220 event pairs, 760 based on Foata normal form. 18/5886 useless extension candidates. Maximal degree in co-relation 40224. Up to 5126 conditions per place. [2024-06-21 15:49:23,190 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 448 selfloop transitions, 57 changer transitions 0/512 dead transitions. [2024-06-21 15:49:23,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 512 transitions, 7280 flow [2024-06-21 15:49:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:49:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:49:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:49:23,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 15:49:23,191 INFO L175 Difference]: Start difference. First operand has 444 places, 483 transitions, 6070 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:49:23,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 512 transitions, 7280 flow [2024-06-21 15:49:25,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 512 transitions, 7172 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:49:25,738 INFO L231 Difference]: Finished difference. Result has 447 places, 488 transitions, 6197 flow [2024-06-21 15:49:25,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=447, PETRI_TRANSITIONS=488} [2024-06-21 15:49:25,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 15:49:25,738 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 488 transitions, 6197 flow [2024-06-21 15:49:25,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:25,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:25,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:25,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 15:49:25,738 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:25,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290850, now seen corresponding path program 4 times [2024-06-21 15:49:25,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:25,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562557023] [2024-06-21 15:49:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:25,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562557023] [2024-06-21 15:49:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562557023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:25,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:25,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:25,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824980992] [2024-06-21 15:49:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:25,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:25,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:25,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:25,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 488 transitions, 6197 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:25,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:25,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:27,103 INFO L124 PetriNetUnfolderBase]: 3487/5852 cut-off events. [2024-06-21 15:49:27,103 INFO L125 PetriNetUnfolderBase]: For 430656/430668 co-relation queries the response was YES. [2024-06-21 15:49:27,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39828 conditions, 5852 events. 3487/5852 cut-off events. For 430656/430668 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40139 event pairs, 721 based on Foata normal form. 18/5869 useless extension candidates. Maximal degree in co-relation 39638. Up to 4754 conditions per place. [2024-06-21 15:49:27,180 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 432 selfloop transitions, 82 changer transitions 0/521 dead transitions. [2024-06-21 15:49:27,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 521 transitions, 7367 flow [2024-06-21 15:49:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:49:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:49:27,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:49:27,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 15:49:27,181 INFO L175 Difference]: Start difference. First operand has 447 places, 488 transitions, 6197 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:49:27,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 521 transitions, 7367 flow [2024-06-21 15:49:29,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 521 transitions, 7246 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 15:49:29,305 INFO L231 Difference]: Finished difference. Result has 449 places, 488 transitions, 6250 flow [2024-06-21 15:49:29,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6250, PETRI_PLACES=449, PETRI_TRANSITIONS=488} [2024-06-21 15:49:29,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-21 15:49:29,305 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 488 transitions, 6250 flow [2024-06-21 15:49:29,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:29,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:29,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:29,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 15:49:29,306 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:29,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565212, now seen corresponding path program 1 times [2024-06-21 15:49:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:29,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10075916] [2024-06-21 15:49:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:29,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:29,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10075916] [2024-06-21 15:49:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10075916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:29,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:29,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:29,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790616480] [2024-06-21 15:49:29,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:29,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:29,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:29,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:29,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 488 transitions, 6250 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:29,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:29,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:29,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:30,553 INFO L124 PetriNetUnfolderBase]: 3523/5910 cut-off events. [2024-06-21 15:49:30,553 INFO L125 PetriNetUnfolderBase]: For 432370/432382 co-relation queries the response was YES. [2024-06-21 15:49:30,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40146 conditions, 5910 events. 3523/5910 cut-off events. For 432370/432382 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 40509 event pairs, 741 based on Foata normal form. 18/5927 useless extension candidates. Maximal degree in co-relation 39956. Up to 5105 conditions per place. [2024-06-21 15:49:30,638 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 439 selfloop transitions, 72 changer transitions 0/518 dead transitions. [2024-06-21 15:49:30,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 518 transitions, 7450 flow [2024-06-21 15:49:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:49:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:49:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:49:30,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 15:49:30,639 INFO L175 Difference]: Start difference. First operand has 449 places, 488 transitions, 6250 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:49:30,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 518 transitions, 7450 flow [2024-06-21 15:49:32,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 518 transitions, 7221 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:49:32,767 INFO L231 Difference]: Finished difference. Result has 450 places, 493 transitions, 6264 flow [2024-06-21 15:49:32,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6021, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6264, PETRI_PLACES=450, PETRI_TRANSITIONS=493} [2024-06-21 15:49:32,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-21 15:49:32,767 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 493 transitions, 6264 flow [2024-06-21 15:49:32,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:32,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:32,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:32,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 15:49:32,768 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:32,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565026, now seen corresponding path program 1 times [2024-06-21 15:49:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:32,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836122893] [2024-06-21 15:49:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:32,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:32,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836122893] [2024-06-21 15:49:32,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836122893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:32,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:32,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263103546] [2024-06-21 15:49:32,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:32,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:32,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:32,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 493 transitions, 6264 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:32,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:32,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:32,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:34,096 INFO L124 PetriNetUnfolderBase]: 3543/5942 cut-off events. [2024-06-21 15:49:34,096 INFO L125 PetriNetUnfolderBase]: For 425713/425725 co-relation queries the response was YES. [2024-06-21 15:49:34,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5942 events. 3543/5942 cut-off events. For 425713/425725 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 40767 event pairs, 800 based on Foata normal form. 18/5959 useless extension candidates. Maximal degree in co-relation 40156. Up to 5195 conditions per place. [2024-06-21 15:49:34,186 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 447 selfloop transitions, 62 changer transitions 0/516 dead transitions. [2024-06-21 15:49:34,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 516 transitions, 7416 flow [2024-06-21 15:49:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:49:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:49:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 15:49:34,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-21 15:49:34,187 INFO L175 Difference]: Start difference. First operand has 450 places, 493 transitions, 6264 flow. Second operand 8 states and 183 transitions. [2024-06-21 15:49:34,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 516 transitions, 7416 flow [2024-06-21 15:49:36,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 516 transitions, 7283 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:49:36,375 INFO L231 Difference]: Finished difference. Result has 452 places, 494 transitions, 6291 flow [2024-06-21 15:49:36,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6291, PETRI_PLACES=452, PETRI_TRANSITIONS=494} [2024-06-21 15:49:36,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 15:49:36,376 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 494 transitions, 6291 flow [2024-06-21 15:49:36,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:36,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:36,376 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, 1] [2024-06-21 15:49:36,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 15:49:36,376 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:36,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1132526266, now seen corresponding path program 2 times [2024-06-21 15:49:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736019329] [2024-06-21 15:49:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:36,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:36,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736019329] [2024-06-21 15:49:36,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736019329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:36,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:36,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:36,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212065916] [2024-06-21 15:49:36,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:36,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:36,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:36,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 494 transitions, 6291 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:36,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:36,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:36,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:37,736 INFO L124 PetriNetUnfolderBase]: 3563/5974 cut-off events. [2024-06-21 15:49:37,736 INFO L125 PetriNetUnfolderBase]: For 426843/426855 co-relation queries the response was YES. [2024-06-21 15:49:37,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40536 conditions, 5974 events. 3563/5974 cut-off events. For 426843/426855 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40996 event pairs, 804 based on Foata normal form. 18/5991 useless extension candidates. Maximal degree in co-relation 40345. Up to 5423 conditions per place. [2024-06-21 15:49:37,815 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 469 selfloop transitions, 35 changer transitions 0/511 dead transitions. [2024-06-21 15:49:37,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 511 transitions, 7383 flow [2024-06-21 15:49:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:49:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:49:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 15:49:37,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-21 15:49:37,816 INFO L175 Difference]: Start difference. First operand has 452 places, 494 transitions, 6291 flow. Second operand 7 states and 156 transitions. [2024-06-21 15:49:37,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 511 transitions, 7383 flow [2024-06-21 15:49:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 511 transitions, 7242 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 15:49:40,098 INFO L231 Difference]: Finished difference. Result has 452 places, 495 transitions, 6252 flow [2024-06-21 15:49:40,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6252, PETRI_PLACES=452, PETRI_TRANSITIONS=495} [2024-06-21 15:49:40,098 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 15:49:40,098 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 495 transitions, 6252 flow [2024-06-21 15:49:40,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:40,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:40,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:40,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 15:49:40,099 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:40,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1132646236, now seen corresponding path program 3 times [2024-06-21 15:49:40,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147180737] [2024-06-21 15:49:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147180737] [2024-06-21 15:49:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147180737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:40,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:40,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:40,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89167790] [2024-06-21 15:49:40,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:40,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:40,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:40,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 495 transitions, 6252 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:40,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:40,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:40,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:41,376 INFO L124 PetriNetUnfolderBase]: 3583/6003 cut-off events. [2024-06-21 15:49:41,376 INFO L125 PetriNetUnfolderBase]: For 426769/426777 co-relation queries the response was YES. [2024-06-21 15:49:41,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40601 conditions, 6003 events. 3583/6003 cut-off events. For 426769/426777 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41072 event pairs, 829 based on Foata normal form. 11/6012 useless extension candidates. Maximal degree in co-relation 40410. Up to 4769 conditions per place. [2024-06-21 15:49:41,470 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 410 selfloop transitions, 100 changer transitions 0/517 dead transitions. [2024-06-21 15:49:41,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 517 transitions, 7434 flow [2024-06-21 15:49:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:49:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:49:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 15:49:41,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-21 15:49:41,471 INFO L175 Difference]: Start difference. First operand has 452 places, 495 transitions, 6252 flow. Second operand 7 states and 162 transitions. [2024-06-21 15:49:41,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 517 transitions, 7434 flow [2024-06-21 15:49:43,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 517 transitions, 7260 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 15:49:43,690 INFO L231 Difference]: Finished difference. Result has 452 places, 496 transitions, 6312 flow [2024-06-21 15:49:43,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6312, PETRI_PLACES=452, PETRI_TRANSITIONS=496} [2024-06-21 15:49:43,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 15:49:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 496 transitions, 6312 flow [2024-06-21 15:49:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:43,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:43,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 15:49:43,691 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:43,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash 171123714, now seen corresponding path program 27 times [2024-06-21 15:49:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:43,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142096451] [2024-06-21 15:49:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:43,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142096451] [2024-06-21 15:49:43,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142096451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:43,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:43,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:43,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052013834] [2024-06-21 15:49:43,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:43,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:43,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:43,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 496 transitions, 6312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:43,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:43,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:43,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:44,940 INFO L124 PetriNetUnfolderBase]: 3611/6054 cut-off events. [2024-06-21 15:49:44,941 INFO L125 PetriNetUnfolderBase]: For 448425/448437 co-relation queries the response was YES. [2024-06-21 15:49:45,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41003 conditions, 6054 events. 3611/6054 cut-off events. For 448425/448437 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 41747 event pairs, 867 based on Foata normal form. 20/6073 useless extension candidates. Maximal degree in co-relation 40813. Up to 5431 conditions per place. [2024-06-21 15:49:45,034 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 443 selfloop transitions, 70 changer transitions 0/520 dead transitions. [2024-06-21 15:49:45,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 520 transitions, 7466 flow [2024-06-21 15:49:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:49:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:49:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 15:49:45,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-21 15:49:45,035 INFO L175 Difference]: Start difference. First operand has 452 places, 496 transitions, 6312 flow. Second operand 9 states and 202 transitions. [2024-06-21 15:49:45,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 520 transitions, 7466 flow [2024-06-21 15:49:47,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 520 transitions, 7250 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:49:47,108 INFO L231 Difference]: Finished difference. Result has 456 places, 497 transitions, 6276 flow [2024-06-21 15:49:47,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6276, PETRI_PLACES=456, PETRI_TRANSITIONS=497} [2024-06-21 15:49:47,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 15:49:47,108 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 497 transitions, 6276 flow [2024-06-21 15:49:47,108 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) [2024-06-21 15:49:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:47,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 15:49:47,109 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:47,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1399118828, now seen corresponding path program 28 times [2024-06-21 15:49:47,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056219875] [2024-06-21 15:49:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:47,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:47,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056219875] [2024-06-21 15:49:47,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056219875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:47,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:47,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026171694] [2024-06-21 15:49:47,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:47,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:47,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:47,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:47,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 497 transitions, 6276 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:47,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:47,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:47,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:48,336 INFO L124 PetriNetUnfolderBase]: 3639/6095 cut-off events. [2024-06-21 15:49:48,336 INFO L125 PetriNetUnfolderBase]: For 454732/454740 co-relation queries the response was YES. [2024-06-21 15:49:48,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41173 conditions, 6095 events. 3639/6095 cut-off events. For 454732/454740 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 41971 event pairs, 895 based on Foata normal form. 13/6106 useless extension candidates. Maximal degree in co-relation 40982. Up to 5468 conditions per place. [2024-06-21 15:49:48,421 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 89 changer transitions 0/514 dead transitions. [2024-06-21 15:49:48,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 514 transitions, 7402 flow [2024-06-21 15:49:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:49:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:49:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 15:49:48,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:49:48,422 INFO L175 Difference]: Start difference. First operand has 456 places, 497 transitions, 6276 flow. Second operand 8 states and 176 transitions. [2024-06-21 15:49:48,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 514 transitions, 7402 flow [2024-06-21 15:49:50,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 514 transitions, 7252 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 15:49:50,417 INFO L231 Difference]: Finished difference. Result has 457 places, 498 transitions, 6343 flow [2024-06-21 15:49:50,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6343, PETRI_PLACES=457, PETRI_TRANSITIONS=498} [2024-06-21 15:49:50,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-21 15:49:50,418 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 498 transitions, 6343 flow [2024-06-21 15:49:50,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:50,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:50,418 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, 1] [2024-06-21 15:49:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 15:49:50,418 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:50,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -583194814, now seen corresponding path program 29 times [2024-06-21 15:49:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163629109] [2024-06-21 15:49:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:50,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:50,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163629109] [2024-06-21 15:49:50,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163629109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:50,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:50,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923585606] [2024-06-21 15:49:50,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:50,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:50,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 498 transitions, 6343 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:50,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:50,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:50,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:51,677 INFO L124 PetriNetUnfolderBase]: 3654/6120 cut-off events. [2024-06-21 15:49:51,678 INFO L125 PetriNetUnfolderBase]: For 448136/448144 co-relation queries the response was YES. [2024-06-21 15:49:51,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41160 conditions, 6120 events. 3654/6120 cut-off events. For 448136/448144 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42226 event pairs, 892 based on Foata normal form. 13/6131 useless extension candidates. Maximal degree in co-relation 40968. Up to 5385 conditions per place. [2024-06-21 15:49:51,771 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 421 selfloop transitions, 91 changer transitions 0/519 dead transitions. [2024-06-21 15:49:51,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 519 transitions, 7533 flow [2024-06-21 15:49:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:49:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:49:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 15:49:51,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-21 15:49:51,772 INFO L175 Difference]: Start difference. First operand has 457 places, 498 transitions, 6343 flow. Second operand 8 states and 179 transitions. [2024-06-21 15:49:51,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 519 transitions, 7533 flow [2024-06-21 15:49:54,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 519 transitions, 7340 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 15:49:54,061 INFO L231 Difference]: Finished difference. Result has 459 places, 499 transitions, 6372 flow [2024-06-21 15:49:54,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6372, PETRI_PLACES=459, PETRI_TRANSITIONS=499} [2024-06-21 15:49:54,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 15:49:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 499 transitions, 6372 flow [2024-06-21 15:49:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:54,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:54,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:54,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 15:49:54,062 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:54,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:54,062 INFO L85 PathProgramCache]: Analyzing trace with hash -555158446, now seen corresponding path program 7 times [2024-06-21 15:49:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314010224] [2024-06-21 15:49:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:54,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:54,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314010224] [2024-06-21 15:49:54,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314010224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:54,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:54,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937989271] [2024-06-21 15:49:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:54,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:54,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:54,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 499 transitions, 6372 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:54,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:54,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:54,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:55,364 INFO L124 PetriNetUnfolderBase]: 3715/6224 cut-off events. [2024-06-21 15:49:55,365 INFO L125 PetriNetUnfolderBase]: For 483088/483100 co-relation queries the response was YES. [2024-06-21 15:49:55,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42584 conditions, 6224 events. 3715/6224 cut-off events. For 483088/483100 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 42998 event pairs, 799 based on Foata normal form. 18/6241 useless extension candidates. Maximal degree in co-relation 42391. Up to 5469 conditions per place. [2024-06-21 15:49:55,457 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 470 selfloop transitions, 59 changer transitions 0/536 dead transitions. [2024-06-21 15:49:55,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 536 transitions, 7863 flow [2024-06-21 15:49:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:49:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:49:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 15:49:55,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 15:49:55,458 INFO L175 Difference]: Start difference. First operand has 459 places, 499 transitions, 6372 flow. Second operand 9 states and 203 transitions. [2024-06-21 15:49:55,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 536 transitions, 7863 flow [2024-06-21 15:49:57,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 536 transitions, 7663 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 15:49:57,619 INFO L231 Difference]: Finished difference. Result has 462 places, 504 transitions, 6375 flow [2024-06-21 15:49:57,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6375, PETRI_PLACES=462, PETRI_TRANSITIONS=504} [2024-06-21 15:49:57,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-21 15:49:57,620 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 504 transitions, 6375 flow [2024-06-21 15:49:57,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:57,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:49:57,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:49:57,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 15:49:57,620 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:49:57,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:49:57,621 INFO L85 PathProgramCache]: Analyzing trace with hash -212193680, now seen corresponding path program 8 times [2024-06-21 15:49:57,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:49:57,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484177159] [2024-06-21 15:49:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:49:57,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:49:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:49:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:49:57,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:49:57,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484177159] [2024-06-21 15:49:57,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484177159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:49:57,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:49:57,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:49:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938397979] [2024-06-21 15:49:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:49:57,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:49:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:49:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:49:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:49:57,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:49:57,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 504 transitions, 6375 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:49:57,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:49:57,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:49:57,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:49:58,960 INFO L124 PetriNetUnfolderBase]: 3735/6260 cut-off events. [2024-06-21 15:49:58,961 INFO L125 PetriNetUnfolderBase]: For 490006/490018 co-relation queries the response was YES. [2024-06-21 15:49:59,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42803 conditions, 6260 events. 3735/6260 cut-off events. For 490006/490018 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43279 event pairs, 804 based on Foata normal form. 18/6277 useless extension candidates. Maximal degree in co-relation 42609. Up to 5546 conditions per place. [2024-06-21 15:49:59,059 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 463 selfloop transitions, 59 changer transitions 0/529 dead transitions. [2024-06-21 15:49:59,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 529 transitions, 7527 flow [2024-06-21 15:49:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:49:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:49:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 15:49:59,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-21 15:49:59,060 INFO L175 Difference]: Start difference. First operand has 462 places, 504 transitions, 6375 flow. Second operand 8 states and 180 transitions. [2024-06-21 15:49:59,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 529 transitions, 7527 flow [2024-06-21 15:50:01,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 529 transitions, 7368 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 15:50:01,376 INFO L231 Difference]: Finished difference. Result has 465 places, 505 transitions, 6370 flow [2024-06-21 15:50:01,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6370, PETRI_PLACES=465, PETRI_TRANSITIONS=505} [2024-06-21 15:50:01,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-21 15:50:01,376 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 505 transitions, 6370 flow [2024-06-21 15:50:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:01,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:01,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 15:50:01,377 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:01,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -200479696, now seen corresponding path program 9 times [2024-06-21 15:50:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:01,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739338807] [2024-06-21 15:50:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:01,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739338807] [2024-06-21 15:50:01,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739338807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:01,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:01,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064655574] [2024-06-21 15:50:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:01,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:01,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:01,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:01,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:01,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 505 transitions, 6370 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:01,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:01,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:01,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:02,783 INFO L124 PetriNetUnfolderBase]: 3788/6349 cut-off events. [2024-06-21 15:50:02,783 INFO L125 PetriNetUnfolderBase]: For 541314/541326 co-relation queries the response was YES. [2024-06-21 15:50:02,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43910 conditions, 6349 events. 3788/6349 cut-off events. For 541314/541326 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44042 event pairs, 871 based on Foata normal form. 18/6366 useless extension candidates. Maximal degree in co-relation 43717. Up to 4951 conditions per place. [2024-06-21 15:50:02,870 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 433 selfloop transitions, 97 changer transitions 0/537 dead transitions. [2024-06-21 15:50:02,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 537 transitions, 7882 flow [2024-06-21 15:50:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:50:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:50:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 15:50:02,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 15:50:02,872 INFO L175 Difference]: Start difference. First operand has 465 places, 505 transitions, 6370 flow. Second operand 8 states and 188 transitions. [2024-06-21 15:50:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 537 transitions, 7882 flow [2024-06-21 15:50:05,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 537 transitions, 7723 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 15:50:05,666 INFO L231 Difference]: Finished difference. Result has 464 places, 507 transitions, 6477 flow [2024-06-21 15:50:05,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6477, PETRI_PLACES=464, PETRI_TRANSITIONS=507} [2024-06-21 15:50:05,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-21 15:50:05,668 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 507 transitions, 6477 flow [2024-06-21 15:50:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:05,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:05,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 15:50:05,669 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:05,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1547199018, now seen corresponding path program 10 times [2024-06-21 15:50:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144915459] [2024-06-21 15:50:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:05,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:05,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144915459] [2024-06-21 15:50:05,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144915459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:05,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:05,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287483694] [2024-06-21 15:50:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:05,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:05,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:05,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:05,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:05,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:05,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 507 transitions, 6477 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:05,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:05,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:05,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:07,010 INFO L124 PetriNetUnfolderBase]: 3887/6500 cut-off events. [2024-06-21 15:50:07,010 INFO L125 PetriNetUnfolderBase]: For 629022/629034 co-relation queries the response was YES. [2024-06-21 15:50:07,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46860 conditions, 6500 events. 3887/6500 cut-off events. For 629022/629034 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45263 event pairs, 946 based on Foata normal form. 18/6517 useless extension candidates. Maximal degree in co-relation 46669. Up to 5641 conditions per place. [2024-06-21 15:50:07,108 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 79 changer transitions 0/537 dead transitions. [2024-06-21 15:50:07,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 537 transitions, 8245 flow [2024-06-21 15:50:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:50:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:50:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 15:50:07,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 15:50:07,109 INFO L175 Difference]: Start difference. First operand has 464 places, 507 transitions, 6477 flow. Second operand 8 states and 186 transitions. [2024-06-21 15:50:07,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 537 transitions, 8245 flow [2024-06-21 15:50:10,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 537 transitions, 8126 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 15:50:10,277 INFO L231 Difference]: Finished difference. Result has 469 places, 510 transitions, 6622 flow [2024-06-21 15:50:10,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6622, PETRI_PLACES=469, PETRI_TRANSITIONS=510} [2024-06-21 15:50:10,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-21 15:50:10,278 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 510 transitions, 6622 flow [2024-06-21 15:50:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:10,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:10,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 15:50:10,278 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:10,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash -988545966, now seen corresponding path program 11 times [2024-06-21 15:50:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:10,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173275895] [2024-06-21 15:50:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:10,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173275895] [2024-06-21 15:50:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173275895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:10,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:10,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924178137] [2024-06-21 15:50:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:10,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:10,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:10,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 510 transitions, 6622 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:10,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:10,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:10,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:11,645 INFO L124 PetriNetUnfolderBase]: 3874/6477 cut-off events. [2024-06-21 15:50:11,645 INFO L125 PetriNetUnfolderBase]: For 596244/596256 co-relation queries the response was YES. [2024-06-21 15:50:11,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46205 conditions, 6477 events. 3874/6477 cut-off events. For 596244/596256 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45089 event pairs, 956 based on Foata normal form. 18/6490 useless extension candidates. Maximal degree in co-relation 46011. Up to 5902 conditions per place. [2024-06-21 15:50:11,743 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 482 selfloop transitions, 41 changer transitions 0/530 dead transitions. [2024-06-21 15:50:11,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 530 transitions, 7736 flow [2024-06-21 15:50:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:50:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:50:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 15:50:11,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:50:11,744 INFO L175 Difference]: Start difference. First operand has 469 places, 510 transitions, 6622 flow. Second operand 8 states and 176 transitions. [2024-06-21 15:50:11,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 530 transitions, 7736 flow [2024-06-21 15:50:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 530 transitions, 7620 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 15:50:14,836 INFO L231 Difference]: Finished difference. Result has 474 places, 510 transitions, 6592 flow [2024-06-21 15:50:14,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=474, PETRI_TRANSITIONS=510} [2024-06-21 15:50:14,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-21 15:50:14,836 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 510 transitions, 6592 flow [2024-06-21 15:50:14,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:14,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:14,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 15:50:14,836 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash -854598066, now seen corresponding path program 12 times [2024-06-21 15:50:14,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:14,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406934575] [2024-06-21 15:50:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:14,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406934575] [2024-06-21 15:50:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406934575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:14,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:14,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:14,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167914271] [2024-06-21 15:50:14,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:14,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:14,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:14,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 510 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:14,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:14,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:14,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:16,184 INFO L124 PetriNetUnfolderBase]: 3902/6531 cut-off events. [2024-06-21 15:50:16,185 INFO L125 PetriNetUnfolderBase]: For 619620/619632 co-relation queries the response was YES. [2024-06-21 15:50:16,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46599 conditions, 6531 events. 3902/6531 cut-off events. For 619620/619632 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 45534 event pairs, 994 based on Foata normal form. 20/6550 useless extension candidates. Maximal degree in co-relation 46403. Up to 5901 conditions per place. [2024-06-21 15:50:16,285 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 72 changer transitions 0/530 dead transitions. [2024-06-21 15:50:16,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 530 transitions, 7756 flow [2024-06-21 15:50:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:50:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:50:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-21 15:50:16,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-21 15:50:16,285 INFO L175 Difference]: Start difference. First operand has 474 places, 510 transitions, 6592 flow. Second operand 8 states and 179 transitions. [2024-06-21 15:50:16,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 530 transitions, 7756 flow [2024-06-21 15:50:19,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 530 transitions, 7660 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:50:19,146 INFO L231 Difference]: Finished difference. Result has 475 places, 511 transitions, 6681 flow [2024-06-21 15:50:19,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6681, PETRI_PLACES=475, PETRI_TRANSITIONS=511} [2024-06-21 15:50:19,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 15:50:19,146 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 511 transitions, 6681 flow [2024-06-21 15:50:19,146 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) [2024-06-21 15:50:19,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:19,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:19,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 15:50:19,147 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash -846027186, now seen corresponding path program 13 times [2024-06-21 15:50:19,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:19,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066925689] [2024-06-21 15:50:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:19,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066925689] [2024-06-21 15:50:19,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066925689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:19,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:19,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116918357] [2024-06-21 15:50:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:19,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:19,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 511 transitions, 6681 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:19,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:19,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:19,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:20,687 INFO L124 PetriNetUnfolderBase]: 3884/6501 cut-off events. [2024-06-21 15:50:20,687 INFO L125 PetriNetUnfolderBase]: For 570195/570207 co-relation queries the response was YES. [2024-06-21 15:50:20,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45546 conditions, 6501 events. 3884/6501 cut-off events. For 570195/570207 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 45318 event pairs, 968 based on Foata normal form. 20/6520 useless extension candidates. Maximal degree in co-relation 45349. Up to 5767 conditions per place. [2024-06-21 15:50:20,784 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-21 15:50:20,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 534 transitions, 7867 flow [2024-06-21 15:50:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:50:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:50:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 15:50:20,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 15:50:20,785 INFO L175 Difference]: Start difference. First operand has 475 places, 511 transitions, 6681 flow. Second operand 8 states and 182 transitions. [2024-06-21 15:50:20,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 534 transitions, 7867 flow [2024-06-21 15:50:23,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 534 transitions, 7696 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 15:50:23,440 INFO L231 Difference]: Finished difference. Result has 477 places, 511 transitions, 6662 flow [2024-06-21 15:50:23,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6662, PETRI_PLACES=477, PETRI_TRANSITIONS=511} [2024-06-21 15:50:23,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-21 15:50:23,440 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 511 transitions, 6662 flow [2024-06-21 15:50:23,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:23,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:23,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 15:50:23,441 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:23,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash -858567632, now seen corresponding path program 14 times [2024-06-21 15:50:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391345114] [2024-06-21 15:50:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:23,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:23,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391345114] [2024-06-21 15:50:23,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391345114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:23,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:23,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844288999] [2024-06-21 15:50:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:23,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 511 transitions, 6662 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:24,829 INFO L124 PetriNetUnfolderBase]: 3899/6530 cut-off events. [2024-06-21 15:50:24,829 INFO L125 PetriNetUnfolderBase]: For 561479/561491 co-relation queries the response was YES. [2024-06-21 15:50:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45449 conditions, 6530 events. 3899/6530 cut-off events. For 561479/561491 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45578 event pairs, 983 based on Foata normal form. 20/6549 useless extension candidates. Maximal degree in co-relation 45251. Up to 5964 conditions per place. [2024-06-21 15:50:24,927 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 492 selfloop transitions, 34 changer transitions 0/533 dead transitions. [2024-06-21 15:50:24,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 533 transitions, 7842 flow [2024-06-21 15:50:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 15:50:24,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 15:50:24,928 INFO L175 Difference]: Start difference. First operand has 477 places, 511 transitions, 6662 flow. Second operand 7 states and 161 transitions. [2024-06-21 15:50:24,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 533 transitions, 7842 flow [2024-06-21 15:50:28,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 533 transitions, 7672 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:50:28,169 INFO L231 Difference]: Finished difference. Result has 477 places, 512 transitions, 6605 flow [2024-06-21 15:50:28,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6605, PETRI_PLACES=477, PETRI_TRANSITIONS=512} [2024-06-21 15:50:28,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-21 15:50:28,169 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 512 transitions, 6605 flow [2024-06-21 15:50:28,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:28,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:28,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 15:50:28,169 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:28,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash -858715502, now seen corresponding path program 15 times [2024-06-21 15:50:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795035014] [2024-06-21 15:50:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:28,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:28,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795035014] [2024-06-21 15:50:28,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795035014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:28,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879737939] [2024-06-21 15:50:28,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:28,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:28,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:28,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 512 transitions, 6605 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:28,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:28,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:28,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:29,614 INFO L124 PetriNetUnfolderBase]: 3886/6511 cut-off events. [2024-06-21 15:50:29,614 INFO L125 PetriNetUnfolderBase]: For 508986/508998 co-relation queries the response was YES. [2024-06-21 15:50:29,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44449 conditions, 6511 events. 3886/6511 cut-off events. For 508986/508998 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45439 event pairs, 970 based on Foata normal form. 18/6528 useless extension candidates. Maximal degree in co-relation 44250. Up to 5897 conditions per place. [2024-06-21 15:50:29,713 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 494 selfloop transitions, 39 changer transitions 0/540 dead transitions. [2024-06-21 15:50:29,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 540 transitions, 7799 flow [2024-06-21 15:50:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:50:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:50:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 15:50:29,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-21 15:50:29,714 INFO L175 Difference]: Start difference. First operand has 477 places, 512 transitions, 6605 flow. Second operand 8 states and 185 transitions. [2024-06-21 15:50:29,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 540 transitions, 7799 flow [2024-06-21 15:50:32,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 540 transitions, 7704 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 15:50:32,420 INFO L231 Difference]: Finished difference. Result has 480 places, 512 transitions, 6592 flow [2024-06-21 15:50:32,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=480, PETRI_TRANSITIONS=512} [2024-06-21 15:50:32,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 15:50:32,421 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 512 transitions, 6592 flow [2024-06-21 15:50:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:32,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:32,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:32,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 15:50:32,421 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:32,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash -593018222, now seen corresponding path program 16 times [2024-06-21 15:50:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:32,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171495236] [2024-06-21 15:50:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:32,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:32,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171495236] [2024-06-21 15:50:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171495236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:32,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935994589] [2024-06-21 15:50:32,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:32,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:32,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:32,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:32,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 512 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:33,853 INFO L124 PetriNetUnfolderBase]: 3873/6492 cut-off events. [2024-06-21 15:50:33,854 INFO L125 PetriNetUnfolderBase]: For 467729/467741 co-relation queries the response was YES. [2024-06-21 15:50:33,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43440 conditions, 6492 events. 3873/6492 cut-off events. For 467729/467741 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45359 event pairs, 867 based on Foata normal form. 18/6509 useless extension candidates. Maximal degree in co-relation 43240. Up to 5834 conditions per place. [2024-06-21 15:50:33,951 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 485 selfloop transitions, 45 changer transitions 0/537 dead transitions. [2024-06-21 15:50:33,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 537 transitions, 7734 flow [2024-06-21 15:50:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 15:50:33,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 15:50:33,952 INFO L175 Difference]: Start difference. First operand has 480 places, 512 transitions, 6592 flow. Second operand 7 states and 165 transitions. [2024-06-21 15:50:33,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 537 transitions, 7734 flow [2024-06-21 15:50:36,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 537 transitions, 7556 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 15:50:36,505 INFO L231 Difference]: Finished difference. Result has 480 places, 512 transitions, 6508 flow [2024-06-21 15:50:36,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6414, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6508, PETRI_PLACES=480, PETRI_TRANSITIONS=512} [2024-06-21 15:50:36,506 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 15:50:36,506 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 512 transitions, 6508 flow [2024-06-21 15:50:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:36,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:36,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 15:50:36,506 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:36,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:36,506 INFO L85 PathProgramCache]: Analyzing trace with hash 171308412, now seen corresponding path program 17 times [2024-06-21 15:50:36,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:36,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512713710] [2024-06-21 15:50:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:36,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:36,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512713710] [2024-06-21 15:50:36,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512713710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:36,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:36,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:36,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337630833] [2024-06-21 15:50:36,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:36,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:36,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:36,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 512 transitions, 6508 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:36,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:36,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:36,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:38,087 INFO L124 PetriNetUnfolderBase]: 3901/6536 cut-off events. [2024-06-21 15:50:38,088 INFO L125 PetriNetUnfolderBase]: For 490500/490512 co-relation queries the response was YES. [2024-06-21 15:50:38,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43583 conditions, 6536 events. 3901/6536 cut-off events. For 490500/490512 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 45678 event pairs, 973 based on Foata normal form. 20/6555 useless extension candidates. Maximal degree in co-relation 43383. Up to 5925 conditions per place. [2024-06-21 15:50:38,174 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 458 selfloop transitions, 69 changer transitions 0/534 dead transitions. [2024-06-21 15:50:38,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 534 transitions, 7684 flow [2024-06-21 15:50:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:50:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:50:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-21 15:50:38,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 15:50:38,175 INFO L175 Difference]: Start difference. First operand has 480 places, 512 transitions, 6508 flow. Second operand 10 states and 215 transitions. [2024-06-21 15:50:38,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 534 transitions, 7684 flow [2024-06-21 15:50:40,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 534 transitions, 7502 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 15:50:40,583 INFO L231 Difference]: Finished difference. Result has 481 places, 513 transitions, 6505 flow [2024-06-21 15:50:40,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6505, PETRI_PLACES=481, PETRI_TRANSITIONS=513} [2024-06-21 15:50:40,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-21 15:50:40,583 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 513 transitions, 6505 flow [2024-06-21 15:50:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:40,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:40,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:40,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 15:50:40,584 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:40,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash -459070322, now seen corresponding path program 18 times [2024-06-21 15:50:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:40,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246020503] [2024-06-21 15:50:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:40,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246020503] [2024-06-21 15:50:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246020503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:40,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:40,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094217884] [2024-06-21 15:50:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:40,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:40,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 513 transitions, 6505 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:40,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:40,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:40,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:41,995 INFO L124 PetriNetUnfolderBase]: 3929/6580 cut-off events. [2024-06-21 15:50:41,995 INFO L125 PetriNetUnfolderBase]: For 498068/498080 co-relation queries the response was YES. [2024-06-21 15:50:42,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43788 conditions, 6580 events. 3929/6580 cut-off events. For 498068/498080 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 46032 event pairs, 993 based on Foata normal form. 20/6599 useless extension candidates. Maximal degree in co-relation 43589. Up to 5969 conditions per place. [2024-06-21 15:50:42,095 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 463 selfloop transitions, 62 changer transitions 0/532 dead transitions. [2024-06-21 15:50:42,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 532 transitions, 7671 flow [2024-06-21 15:50:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-21 15:50:42,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:50:42,096 INFO L175 Difference]: Start difference. First operand has 481 places, 513 transitions, 6505 flow. Second operand 7 states and 160 transitions. [2024-06-21 15:50:42,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 532 transitions, 7671 flow [2024-06-21 15:50:44,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 532 transitions, 7518 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 15:50:44,846 INFO L231 Difference]: Finished difference. Result has 480 places, 514 transitions, 6517 flow [2024-06-21 15:50:44,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6517, PETRI_PLACES=480, PETRI_TRANSITIONS=514} [2024-06-21 15:50:44,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 15:50:44,847 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 514 transitions, 6517 flow [2024-06-21 15:50:44,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:44,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:44,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:44,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 15:50:44,847 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:44,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 399209562, now seen corresponding path program 19 times [2024-06-21 15:50:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:44,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911465776] [2024-06-21 15:50:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:44,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:44,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911465776] [2024-06-21 15:50:44,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911465776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:44,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:44,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:44,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60629991] [2024-06-21 15:50:44,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:44,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:44,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:45,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:45,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 514 transitions, 6517 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:45,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:45,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:45,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:46,271 INFO L124 PetriNetUnfolderBase]: 3957/6624 cut-off events. [2024-06-21 15:50:46,271 INFO L125 PetriNetUnfolderBase]: For 506146/506158 co-relation queries the response was YES. [2024-06-21 15:50:46,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44161 conditions, 6624 events. 3957/6624 cut-off events. For 506146/506158 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 46333 event pairs, 993 based on Foata normal form. 20/6643 useless extension candidates. Maximal degree in co-relation 43961. Up to 6013 conditions per place. [2024-06-21 15:50:46,372 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 462 selfloop transitions, 66 changer transitions 0/535 dead transitions. [2024-06-21 15:50:46,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 535 transitions, 7695 flow [2024-06-21 15:50:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:50:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:50:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 15:50:46,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-21 15:50:46,373 INFO L175 Difference]: Start difference. First operand has 480 places, 514 transitions, 6517 flow. Second operand 9 states and 197 transitions. [2024-06-21 15:50:46,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 535 transitions, 7695 flow [2024-06-21 15:50:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 535 transitions, 7554 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:50:49,400 INFO L231 Difference]: Finished difference. Result has 484 places, 515 transitions, 6551 flow [2024-06-21 15:50:49,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6551, PETRI_PLACES=484, PETRI_TRANSITIONS=515} [2024-06-21 15:50:49,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-21 15:50:49,400 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 515 transitions, 6551 flow [2024-06-21 15:50:49,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:49,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:49,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:49,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 15:50:49,401 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:49,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -450499442, now seen corresponding path program 20 times [2024-06-21 15:50:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:49,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84645204] [2024-06-21 15:50:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:49,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84645204] [2024-06-21 15:50:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84645204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:49,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:49,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066194435] [2024-06-21 15:50:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:49,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:49,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 515 transitions, 6551 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:49,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:49,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:49,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:50,969 INFO L124 PetriNetUnfolderBase]: 3985/6668 cut-off events. [2024-06-21 15:50:50,969 INFO L125 PetriNetUnfolderBase]: For 513957/513969 co-relation queries the response was YES. [2024-06-21 15:50:51,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44556 conditions, 6668 events. 3985/6668 cut-off events. For 513957/513969 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 46740 event pairs, 999 based on Foata normal form. 20/6687 useless extension candidates. Maximal degree in co-relation 44355. Up to 5917 conditions per place. [2024-06-21 15:50:51,060 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 466 selfloop transitions, 65 changer transitions 0/538 dead transitions. [2024-06-21 15:50:51,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 538 transitions, 7781 flow [2024-06-21 15:50:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 15:50:51,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 15:50:51,061 INFO L175 Difference]: Start difference. First operand has 484 places, 515 transitions, 6551 flow. Second operand 7 states and 163 transitions. [2024-06-21 15:50:51,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 538 transitions, 7781 flow [2024-06-21 15:50:53,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 538 transitions, 7630 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 15:50:53,981 INFO L231 Difference]: Finished difference. Result has 484 places, 516 transitions, 6574 flow [2024-06-21 15:50:53,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6400, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6574, PETRI_PLACES=484, PETRI_TRANSITIONS=516} [2024-06-21 15:50:53,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-21 15:50:53,981 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 516 transitions, 6574 flow [2024-06-21 15:50:53,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:53,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:53,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:53,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 15:50:53,982 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:53,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 407780442, now seen corresponding path program 21 times [2024-06-21 15:50:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:53,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574136003] [2024-06-21 15:50:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:54,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574136003] [2024-06-21 15:50:54,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574136003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:54,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:54,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:54,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019456098] [2024-06-21 15:50:54,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:54,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:54,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:54,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:54,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 516 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:54,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:54,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:54,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:55,415 INFO L124 PetriNetUnfolderBase]: 4000/6693 cut-off events. [2024-06-21 15:50:55,415 INFO L125 PetriNetUnfolderBase]: For 504972/504984 co-relation queries the response was YES. [2024-06-21 15:50:55,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44533 conditions, 6693 events. 4000/6693 cut-off events. For 504972/504984 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 46979 event pairs, 1006 based on Foata normal form. 20/6712 useless extension candidates. Maximal degree in co-relation 44331. Up to 5942 conditions per place. [2024-06-21 15:50:55,515 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 69 changer transitions 0/541 dead transitions. [2024-06-21 15:50:55,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 541 transitions, 7816 flow [2024-06-21 15:50:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:50:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:50:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 15:50:55,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 15:50:55,516 INFO L175 Difference]: Start difference. First operand has 484 places, 516 transitions, 6574 flow. Second operand 9 states and 200 transitions. [2024-06-21 15:50:55,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 541 transitions, 7816 flow [2024-06-21 15:50:58,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 541 transitions, 7664 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 15:50:58,319 INFO L231 Difference]: Finished difference. Result has 488 places, 517 transitions, 6606 flow [2024-06-21 15:50:58,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6606, PETRI_PLACES=488, PETRI_TRANSITIONS=517} [2024-06-21 15:50:58,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-21 15:50:58,319 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 517 transitions, 6606 flow [2024-06-21 15:50:58,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:58,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:50:58,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:50:58,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 15:50:58,320 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:50:58,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:50:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash -592602512, now seen corresponding path program 22 times [2024-06-21 15:50:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:50:58,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544151921] [2024-06-21 15:50:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:50:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:50:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:50:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:50:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:50:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544151921] [2024-06-21 15:50:58,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544151921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:50:58,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:50:58,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:50:58,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595717038] [2024-06-21 15:50:58,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:50:58,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:50:58,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:50:58,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:50:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:50:58,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:50:58,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 517 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:50:58,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:50:58,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:50:58,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:50:59,717 INFO L124 PetriNetUnfolderBase]: 3987/6674 cut-off events. [2024-06-21 15:50:59,718 INFO L125 PetriNetUnfolderBase]: For 443054/443066 co-relation queries the response was YES. [2024-06-21 15:50:59,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43484 conditions, 6674 events. 3987/6674 cut-off events. For 443054/443066 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 46880 event pairs, 912 based on Foata normal form. 18/6691 useless extension candidates. Maximal degree in co-relation 43281. Up to 5520 conditions per place. [2024-06-21 15:50:59,820 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 84 changer transitions 0/544 dead transitions. [2024-06-21 15:50:59,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 544 transitions, 7826 flow [2024-06-21 15:50:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:50:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:50:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 15:50:59,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 15:50:59,821 INFO L175 Difference]: Start difference. First operand has 488 places, 517 transitions, 6606 flow. Second operand 7 states and 168 transitions. [2024-06-21 15:50:59,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 544 transitions, 7826 flow [2024-06-21 15:51:02,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 544 transitions, 7654 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:02,526 INFO L231 Difference]: Finished difference. Result has 488 places, 517 transitions, 6606 flow [2024-06-21 15:51:02,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6606, PETRI_PLACES=488, PETRI_TRANSITIONS=517} [2024-06-21 15:51:02,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-21 15:51:02,526 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 517 transitions, 6606 flow [2024-06-21 15:51:02,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:02,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:02,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 15:51:02,527 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:02,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 599620098, now seen corresponding path program 4 times [2024-06-21 15:51:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:02,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545141331] [2024-06-21 15:51:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545141331] [2024-06-21 15:51:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545141331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:02,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:02,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:02,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28800256] [2024-06-21 15:51:02,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:02,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:02,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:02,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:02,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 517 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:02,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:02,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:02,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:04,153 INFO L124 PetriNetUnfolderBase]: 4015/6720 cut-off events. [2024-06-21 15:51:04,153 INFO L125 PetriNetUnfolderBase]: For 448084/448096 co-relation queries the response was YES. [2024-06-21 15:51:04,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43801 conditions, 6720 events. 4015/6720 cut-off events. For 448084/448096 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 47243 event pairs, 995 based on Foata normal form. 18/6737 useless extension candidates. Maximal degree in co-relation 43597. Up to 6015 conditions per place. [2024-06-21 15:51:04,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 464 selfloop transitions, 76 changer transitions 0/547 dead transitions. [2024-06-21 15:51:04,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 547 transitions, 7860 flow [2024-06-21 15:51:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:51:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:51:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 15:51:04,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-21 15:51:04,248 INFO L175 Difference]: Start difference. First operand has 488 places, 517 transitions, 6606 flow. Second operand 10 states and 223 transitions. [2024-06-21 15:51:04,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 547 transitions, 7860 flow [2024-06-21 15:51:06,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 547 transitions, 7465 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 15:51:06,922 INFO L231 Difference]: Finished difference. Result has 490 places, 520 transitions, 6433 flow [2024-06-21 15:51:06,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6433, PETRI_PLACES=490, PETRI_TRANSITIONS=520} [2024-06-21 15:51:06,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-21 15:51:06,922 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 520 transitions, 6433 flow [2024-06-21 15:51:06,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:06,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:06,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:06,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 15:51:06,923 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:06,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 599620284, now seen corresponding path program 2 times [2024-06-21 15:51:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:06,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688236980] [2024-06-21 15:51:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:07,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:07,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688236980] [2024-06-21 15:51:07,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688236980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:07,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:07,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460091957] [2024-06-21 15:51:07,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:07,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:07,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:07,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 520 transitions, 6433 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:07,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:07,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:07,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:08,400 INFO L124 PetriNetUnfolderBase]: 4035/6750 cut-off events. [2024-06-21 15:51:08,400 INFO L125 PetriNetUnfolderBase]: For 451826/451838 co-relation queries the response was YES. [2024-06-21 15:51:08,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43101 conditions, 6750 events. 4035/6750 cut-off events. For 451826/451838 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47488 event pairs, 1027 based on Foata normal form. 18/6767 useless extension candidates. Maximal degree in co-relation 42898. Up to 6027 conditions per place. [2024-06-21 15:51:08,501 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 461 selfloop transitions, 77 changer transitions 0/545 dead transitions. [2024-06-21 15:51:08,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 545 transitions, 7647 flow [2024-06-21 15:51:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 15:51:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 15:51:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 15:51:08,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-21 15:51:08,509 INFO L175 Difference]: Start difference. First operand has 490 places, 520 transitions, 6433 flow. Second operand 10 states and 218 transitions. [2024-06-21 15:51:08,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 545 transitions, 7647 flow [2024-06-21 15:51:11,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 545 transitions, 7479 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 15:51:11,481 INFO L231 Difference]: Finished difference. Result has 492 places, 521 transitions, 6452 flow [2024-06-21 15:51:11,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6452, PETRI_PLACES=492, PETRI_TRANSITIONS=521} [2024-06-21 15:51:11,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-21 15:51:11,482 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 521 transitions, 6452 flow [2024-06-21 15:51:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:11,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:11,482 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, 1] [2024-06-21 15:51:11,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 15:51:11,482 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:11,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 614589564, now seen corresponding path program 3 times [2024-06-21 15:51:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:11,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627580745] [2024-06-21 15:51:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:11,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:11,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:11,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627580745] [2024-06-21 15:51:11,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627580745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:11,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:11,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403508822] [2024-06-21 15:51:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:11,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:11,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:11,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:11,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 521 transitions, 6452 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:11,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:11,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:11,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:12,975 INFO L124 PetriNetUnfolderBase]: 4055/6790 cut-off events. [2024-06-21 15:51:12,975 INFO L125 PetriNetUnfolderBase]: For 451866/451878 co-relation queries the response was YES. [2024-06-21 15:51:13,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43251 conditions, 6790 events. 4055/6790 cut-off events. For 451866/451878 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47790 event pairs, 951 based on Foata normal form. 18/6807 useless extension candidates. Maximal degree in co-relation 43048. Up to 5622 conditions per place. [2024-06-21 15:51:13,084 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 92 changer transitions 0/549 dead transitions. [2024-06-21 15:51:13,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 549 transitions, 7964 flow [2024-06-21 15:51:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 15:51:13,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 15:51:13,085 INFO L175 Difference]: Start difference. First operand has 492 places, 521 transitions, 6452 flow. Second operand 9 states and 203 transitions. [2024-06-21 15:51:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 549 transitions, 7964 flow [2024-06-21 15:51:15,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 549 transitions, 7795 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 15:51:15,727 INFO L231 Difference]: Finished difference. Result has 493 places, 522 transitions, 6499 flow [2024-06-21 15:51:15,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6499, PETRI_PLACES=493, PETRI_TRANSITIONS=522} [2024-06-21 15:51:15,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-21 15:51:15,728 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 522 transitions, 6499 flow [2024-06-21 15:51:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:15,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:15,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:15,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 15:51:15,728 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:15,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 614352228, now seen corresponding path program 5 times [2024-06-21 15:51:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841058554] [2024-06-21 15:51:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:15,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:15,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841058554] [2024-06-21 15:51:15,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841058554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:15,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:15,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:15,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620501484] [2024-06-21 15:51:15,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:15,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:15,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 522 transitions, 6499 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:15,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:15,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:15,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:17,224 INFO L124 PetriNetUnfolderBase]: 4083/6838 cut-off events. [2024-06-21 15:51:17,224 INFO L125 PetriNetUnfolderBase]: For 459092/459104 co-relation queries the response was YES. [2024-06-21 15:51:17,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43740 conditions, 6838 events. 4083/6838 cut-off events. For 459092/459104 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 48186 event pairs, 901 based on Foata normal form. 18/6855 useless extension candidates. Maximal degree in co-relation 43536. Up to 5795 conditions per place. [2024-06-21 15:51:17,324 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 454 selfloop transitions, 91 changer transitions 0/552 dead transitions. [2024-06-21 15:51:17,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 552 transitions, 7769 flow [2024-06-21 15:51:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 15:51:17,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-21 15:51:17,325 INFO L175 Difference]: Start difference. First operand has 493 places, 522 transitions, 6499 flow. Second operand 9 states and 205 transitions. [2024-06-21 15:51:17,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 552 transitions, 7769 flow [2024-06-21 15:51:20,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 552 transitions, 7512 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:20,276 INFO L231 Difference]: Finished difference. Result has 496 places, 525 transitions, 6494 flow [2024-06-21 15:51:20,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=496, PETRI_TRANSITIONS=525} [2024-06-21 15:51:20,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-21 15:51:20,277 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 525 transitions, 6494 flow [2024-06-21 15:51:20,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:20,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:20,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:20,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 15:51:20,277 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:20,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:20,277 INFO L85 PathProgramCache]: Analyzing trace with hash 614352414, now seen corresponding path program 4 times [2024-06-21 15:51:20,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:20,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467697407] [2024-06-21 15:51:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:20,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:20,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467697407] [2024-06-21 15:51:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467697407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:20,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73785209] [2024-06-21 15:51:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:20,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:20,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 525 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:20,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:20,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:20,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:21,724 INFO L124 PetriNetUnfolderBase]: 4070/6819 cut-off events. [2024-06-21 15:51:21,724 INFO L125 PetriNetUnfolderBase]: For 411854/411866 co-relation queries the response was YES. [2024-06-21 15:51:21,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42370 conditions, 6819 events. 4070/6819 cut-off events. For 411854/411866 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 48090 event pairs, 929 based on Foata normal form. 18/6836 useless extension candidates. Maximal degree in co-relation 42165. Up to 5652 conditions per place. [2024-06-21 15:51:21,827 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 452 selfloop transitions, 93 changer transitions 0/552 dead transitions. [2024-06-21 15:51:21,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 552 transitions, 7742 flow [2024-06-21 15:51:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 15:51:21,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 15:51:21,828 INFO L175 Difference]: Start difference. First operand has 496 places, 525 transitions, 6494 flow. Second operand 9 states and 204 transitions. [2024-06-21 15:51:21,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 552 transitions, 7742 flow [2024-06-21 15:51:24,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 552 transitions, 7522 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:24,514 INFO L231 Difference]: Finished difference. Result has 498 places, 525 transitions, 6465 flow [2024-06-21 15:51:24,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6465, PETRI_PLACES=498, PETRI_TRANSITIONS=525} [2024-06-21 15:51:24,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-21 15:51:24,515 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 525 transitions, 6465 flow [2024-06-21 15:51:24,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:24,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:24,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:24,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 15:51:24,515 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)] === [2024-06-21 15:51:24,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:24,515 INFO L85 PathProgramCache]: Analyzing trace with hash -457237660, now seen corresponding path program 6 times [2024-06-21 15:51:24,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:24,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703058078] [2024-06-21 15:51:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:24,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703058078] [2024-06-21 15:51:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703058078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:24,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:24,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604202607] [2024-06-21 15:51:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:24,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:24,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:24,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 525 transitions, 6465 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:24,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:24,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:24,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:25,974 INFO L124 PetriNetUnfolderBase]: 4090/6845 cut-off events. [2024-06-21 15:51:25,974 INFO L125 PetriNetUnfolderBase]: For 411095/411107 co-relation queries the response was YES. [2024-06-21 15:51:26,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42484 conditions, 6845 events. 4090/6845 cut-off events. For 411095/411107 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 48198 event pairs, 1044 based on Foata normal form. 18/6862 useless extension candidates. Maximal degree in co-relation 42279. Up to 6276 conditions per place. [2024-06-21 15:51:26,084 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 501 selfloop transitions, 35 changer transitions 0/543 dead transitions. [2024-06-21 15:51:26,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 543 transitions, 7637 flow [2024-06-21 15:51:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 15:51:26,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-21 15:51:26,085 INFO L175 Difference]: Start difference. First operand has 498 places, 525 transitions, 6465 flow. Second operand 8 states and 173 transitions. [2024-06-21 15:51:26,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 543 transitions, 7637 flow [2024-06-21 15:51:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 543 transitions, 7436 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 15:51:28,657 INFO L231 Difference]: Finished difference. Result has 498 places, 526 transitions, 6380 flow [2024-06-21 15:51:28,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6380, PETRI_PLACES=498, PETRI_TRANSITIONS=526} [2024-06-21 15:51:28,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-21 15:51:28,658 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 526 transitions, 6380 flow [2024-06-21 15:51:28,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:28,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:28,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:28,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 15:51:28,658 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)] === [2024-06-21 15:51:28,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash 379035672, now seen corresponding path program 7 times [2024-06-21 15:51:28,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:28,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155026733] [2024-06-21 15:51:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:28,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:28,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155026733] [2024-06-21 15:51:28,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155026733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:28,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414302692] [2024-06-21 15:51:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:28,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:28,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 526 transitions, 6380 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:28,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:28,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:30,111 INFO L124 PetriNetUnfolderBase]: 4110/6882 cut-off events. [2024-06-21 15:51:30,111 INFO L125 PetriNetUnfolderBase]: For 412418/412426 co-relation queries the response was YES. [2024-06-21 15:51:30,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42493 conditions, 6882 events. 4110/6882 cut-off events. For 412418/412426 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 48641 event pairs, 1052 based on Foata normal form. 11/6891 useless extension candidates. Maximal degree in co-relation 42287. Up to 5989 conditions per place. [2024-06-21 15:51:30,213 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 445 selfloop transitions, 97 changer transitions 0/549 dead transitions. [2024-06-21 15:51:30,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 549 transitions, 7642 flow [2024-06-21 15:51:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 15:51:30,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 15:51:30,214 INFO L175 Difference]: Start difference. First operand has 498 places, 526 transitions, 6380 flow. Second operand 8 states and 181 transitions. [2024-06-21 15:51:30,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 549 transitions, 7642 flow [2024-06-21 15:51:32,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 549 transitions, 7514 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:32,348 INFO L231 Difference]: Finished difference. Result has 499 places, 527 transitions, 6494 flow [2024-06-21 15:51:32,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6494, PETRI_PLACES=499, PETRI_TRANSITIONS=527} [2024-06-21 15:51:32,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-21 15:51:32,349 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 527 transitions, 6494 flow [2024-06-21 15:51:32,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:32,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:32,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:32,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 15:51:32,349 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)] === [2024-06-21 15:51:32,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1458163052, now seen corresponding path program 8 times [2024-06-21 15:51:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:32,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287115435] [2024-06-21 15:51:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:32,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:32,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287115435] [2024-06-21 15:51:32,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287115435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:32,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:32,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012990977] [2024-06-21 15:51:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:32,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:32,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:32,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 527 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:32,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:32,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:32,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:34,039 INFO L124 PetriNetUnfolderBase]: 4171/6986 cut-off events. [2024-06-21 15:51:34,039 INFO L125 PetriNetUnfolderBase]: For 476144/476156 co-relation queries the response was YES. [2024-06-21 15:51:34,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44279 conditions, 6986 events. 4171/6986 cut-off events. For 476144/476156 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49527 event pairs, 969 based on Foata normal form. 18/7003 useless extension candidates. Maximal degree in co-relation 44073. Up to 6246 conditions per place. [2024-06-21 15:51:34,132 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 494 selfloop transitions, 53 changer transitions 0/554 dead transitions. [2024-06-21 15:51:34,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 554 transitions, 8054 flow [2024-06-21 15:51:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:51:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:51:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 15:51:34,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-21 15:51:34,133 INFO L175 Difference]: Start difference. First operand has 499 places, 527 transitions, 6494 flow. Second operand 9 states and 194 transitions. [2024-06-21 15:51:34,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 554 transitions, 8054 flow [2024-06-21 15:51:36,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 554 transitions, 7823 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 15:51:36,971 INFO L231 Difference]: Finished difference. Result has 501 places, 531 transitions, 6479 flow [2024-06-21 15:51:36,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6479, PETRI_PLACES=501, PETRI_TRANSITIONS=531} [2024-06-21 15:51:36,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-21 15:51:36,971 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 531 transitions, 6479 flow [2024-06-21 15:51:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:36,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:36,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:36,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 15:51:36,971 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)] === [2024-06-21 15:51:36,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -644023708, now seen corresponding path program 9 times [2024-06-21 15:51:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:36,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800818191] [2024-06-21 15:51:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:36,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:37,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800818191] [2024-06-21 15:51:37,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800818191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:37,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:37,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293184521] [2024-06-21 15:51:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:37,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:37,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:37,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:37,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 531 transitions, 6479 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:37,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:37,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:37,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:38,450 INFO L124 PetriNetUnfolderBase]: 4158/6967 cut-off events. [2024-06-21 15:51:38,450 INFO L125 PetriNetUnfolderBase]: For 419801/419813 co-relation queries the response was YES. [2024-06-21 15:51:38,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43018 conditions, 6967 events. 4158/6967 cut-off events. For 419801/419813 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49413 event pairs, 967 based on Foata normal form. 18/6984 useless extension candidates. Maximal degree in co-relation 42812. Up to 6312 conditions per place. [2024-06-21 15:51:38,557 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 492 selfloop transitions, 50 changer transitions 0/549 dead transitions. [2024-06-21 15:51:38,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 549 transitions, 7625 flow [2024-06-21 15:51:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 15:51:38,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-21 15:51:38,558 INFO L175 Difference]: Start difference. First operand has 501 places, 531 transitions, 6479 flow. Second operand 8 states and 174 transitions. [2024-06-21 15:51:38,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 549 transitions, 7625 flow [2024-06-21 15:51:40,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 549 transitions, 7498 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 15:51:40,803 INFO L231 Difference]: Finished difference. Result has 505 places, 531 transitions, 6456 flow [2024-06-21 15:51:40,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6456, PETRI_PLACES=505, PETRI_TRANSITIONS=531} [2024-06-21 15:51:40,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-21 15:51:40,803 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 531 transitions, 6456 flow [2024-06-21 15:51:40,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:40,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:40,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:40,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 15:51:40,804 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)] === [2024-06-21 15:51:40,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 328462586, now seen corresponding path program 10 times [2024-06-21 15:51:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:40,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616137424] [2024-06-21 15:51:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:40,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:40,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616137424] [2024-06-21 15:51:40,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616137424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:40,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:40,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 15:51:40,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749848278] [2024-06-21 15:51:40,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:40,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 15:51:40,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 15:51:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 15:51:40,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:40,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 531 transitions, 6456 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:40,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:40,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:40,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:42,246 INFO L124 PetriNetUnfolderBase]: 4145/6945 cut-off events. [2024-06-21 15:51:42,246 INFO L125 PetriNetUnfolderBase]: For 364766/364774 co-relation queries the response was YES. [2024-06-21 15:51:42,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41785 conditions, 6945 events. 4145/6945 cut-off events. For 364766/364774 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49022 event pairs, 1025 based on Foata normal form. 11/6954 useless extension candidates. Maximal degree in co-relation 41578. Up to 5226 conditions per place. [2024-06-21 15:51:42,356 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 422 selfloop transitions, 125 changer transitions 0/554 dead transitions. [2024-06-21 15:51:42,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 554 transitions, 7688 flow [2024-06-21 15:51:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:51:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:51:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 15:51:42,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-21 15:51:42,357 INFO L175 Difference]: Start difference. First operand has 505 places, 531 transitions, 6456 flow. Second operand 8 states and 181 transitions. [2024-06-21 15:51:42,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 554 transitions, 7688 flow [2024-06-21 15:51:44,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 554 transitions, 7562 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:51:44,793 INFO L231 Difference]: Finished difference. Result has 505 places, 531 transitions, 6584 flow [2024-06-21 15:51:44,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6584, PETRI_PLACES=505, PETRI_TRANSITIONS=531} [2024-06-21 15:51:44,793 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-21 15:51:44,793 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 531 transitions, 6584 flow [2024-06-21 15:51:44,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:44,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:44,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:44,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 15:51:44,793 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:44,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash -839813868, now seen corresponding path program 1 times [2024-06-21 15:51:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733006758] [2024-06-21 15:51:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:44,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:44,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733006758] [2024-06-21 15:51:44,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733006758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:44,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:44,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:51:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489704556] [2024-06-21 15:51:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:51:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:51:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:51:44,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:44,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 531 transitions, 6584 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:44,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:44,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:44,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:46,602 INFO L124 PetriNetUnfolderBase]: 4434/7466 cut-off events. [2024-06-21 15:51:46,602 INFO L125 PetriNetUnfolderBase]: For 944983/944991 co-relation queries the response was YES. [2024-06-21 15:51:46,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51665 conditions, 7466 events. 4434/7466 cut-off events. For 944983/944991 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 53325 event pairs, 1057 based on Foata normal form. 26/7490 useless extension candidates. Maximal degree in co-relation 51457. Up to 2793 conditions per place. [2024-06-21 15:51:46,713 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 234 changer transitions 16/587 dead transitions. [2024-06-21 15:51:46,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 587 transitions, 8644 flow [2024-06-21 15:51:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:51:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:51:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-21 15:51:46,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068181818181818 [2024-06-21 15:51:46,713 INFO L175 Difference]: Start difference. First operand has 505 places, 531 transitions, 6584 flow. Second operand 11 states and 267 transitions. [2024-06-21 15:51:46,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 587 transitions, 8644 flow [2024-06-21 15:51:52,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 587 transitions, 8256 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 15:51:52,143 INFO L231 Difference]: Finished difference. Result has 508 places, 528 transitions, 6638 flow [2024-06-21 15:51:52,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6196, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6638, PETRI_PLACES=508, PETRI_TRANSITIONS=528} [2024-06-21 15:51:52,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-21 15:51:52,143 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 528 transitions, 6638 flow [2024-06-21 15:51:52,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:52,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:52,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:52,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 15:51:52,144 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:52,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash 119382632, now seen corresponding path program 2 times [2024-06-21 15:51:52,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:52,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146275712] [2024-06-21 15:51:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:52,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:52,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:52,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146275712] [2024-06-21 15:51:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146275712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:52,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:52,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:51:52,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794922964] [2024-06-21 15:51:52,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:51:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:51:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:51:52,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:52,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 528 transitions, 6638 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:52,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:52,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:52,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:51:54,018 INFO L124 PetriNetUnfolderBase]: 4444/7485 cut-off events. [2024-06-21 15:51:54,018 INFO L125 PetriNetUnfolderBase]: For 1123322/1123334 co-relation queries the response was YES. [2024-06-21 15:51:54,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53624 conditions, 7485 events. 4444/7485 cut-off events. For 1123322/1123334 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 53626 event pairs, 926 based on Foata normal form. 30/7514 useless extension candidates. Maximal degree in co-relation 53417. Up to 5422 conditions per place. [2024-06-21 15:51:54,126 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 433 selfloop transitions, 129 changer transitions 8/577 dead transitions. [2024-06-21 15:51:54,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 577 transitions, 8354 flow [2024-06-21 15:51:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:51:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:51:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-21 15:51:54,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-21 15:51:54,128 INFO L175 Difference]: Start difference. First operand has 508 places, 528 transitions, 6638 flow. Second operand 11 states and 256 transitions. [2024-06-21 15:51:54,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 577 transitions, 8354 flow [2024-06-21 15:51:59,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 577 transitions, 7892 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 15:51:59,447 INFO L231 Difference]: Finished difference. Result has 506 places, 526 transitions, 6425 flow [2024-06-21 15:51:59,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6425, PETRI_PLACES=506, PETRI_TRANSITIONS=526} [2024-06-21 15:51:59,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-21 15:51:59,447 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 526 transitions, 6425 flow [2024-06-21 15:51:59,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:59,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:51:59,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:51:59,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 15:51:59,447 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:51:59,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:51:59,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1116196246, now seen corresponding path program 3 times [2024-06-21 15:51:59,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:51:59,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827531434] [2024-06-21 15:51:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:51:59,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:51:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:51:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:51:59,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:51:59,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827531434] [2024-06-21 15:51:59,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827531434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:51:59,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:51:59,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:51:59,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975087221] [2024-06-21 15:51:59,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:51:59,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:51:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:51:59,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:51:59,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:51:59,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:51:59,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 526 transitions, 6425 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:51:59,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:51:59,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:51:59,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:01,220 INFO L124 PetriNetUnfolderBase]: 4212/7077 cut-off events. [2024-06-21 15:52:01,220 INFO L125 PetriNetUnfolderBase]: For 701657/701669 co-relation queries the response was YES. [2024-06-21 15:52:01,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45666 conditions, 7077 events. 4212/7077 cut-off events. For 701657/701669 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50210 event pairs, 825 based on Foata normal form. 30/7106 useless extension candidates. Maximal degree in co-relation 45460. Up to 5217 conditions per place. [2024-06-21 15:52:01,321 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 126 changer transitions 19/570 dead transitions. [2024-06-21 15:52:01,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 570 transitions, 7801 flow [2024-06-21 15:52:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 15:52:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 15:52:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-21 15:52:01,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-21 15:52:01,322 INFO L175 Difference]: Start difference. First operand has 506 places, 526 transitions, 6425 flow. Second operand 11 states and 250 transitions. [2024-06-21 15:52:01,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 570 transitions, 7801 flow [2024-06-21 15:52:04,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 570 transitions, 7540 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 15:52:04,870 INFO L231 Difference]: Finished difference. Result has 505 places, 522 transitions, 6369 flow [2024-06-21 15:52:04,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6369, PETRI_PLACES=505, PETRI_TRANSITIONS=522} [2024-06-21 15:52:04,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-21 15:52:04,870 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 522 transitions, 6369 flow [2024-06-21 15:52:04,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:04,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:04,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:04,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 15:52:04,870 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:04,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 263480552, now seen corresponding path program 4 times [2024-06-21 15:52:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232702596] [2024-06-21 15:52:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232702596] [2024-06-21 15:52:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232702596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:04,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:04,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844891530] [2024-06-21 15:52:04,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:04,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:05,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:05,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 522 transitions, 6369 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:05,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:05,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:05,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:06,561 INFO L124 PetriNetUnfolderBase]: 4333/7298 cut-off events. [2024-06-21 15:52:06,561 INFO L125 PetriNetUnfolderBase]: For 1019541/1019553 co-relation queries the response was YES. [2024-06-21 15:52:06,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51397 conditions, 7298 events. 4333/7298 cut-off events. For 1019541/1019553 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 51962 event pairs, 933 based on Foata normal form. 30/7327 useless extension candidates. Maximal degree in co-relation 51192. Up to 5061 conditions per place. [2024-06-21 15:52:06,675 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 428 selfloop transitions, 125 changer transitions 13/573 dead transitions. [2024-06-21 15:52:06,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 573 transitions, 8071 flow [2024-06-21 15:52:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:52:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:52:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 287 transitions. [2024-06-21 15:52:06,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2024-06-21 15:52:06,676 INFO L175 Difference]: Start difference. First operand has 505 places, 522 transitions, 6369 flow. Second operand 13 states and 287 transitions. [2024-06-21 15:52:06,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 573 transitions, 8071 flow [2024-06-21 15:52:11,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 573 transitions, 7792 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 15:52:11,782 INFO L231 Difference]: Finished difference. Result has 501 places, 519 transitions, 6304 flow [2024-06-21 15:52:11,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6304, PETRI_PLACES=501, PETRI_TRANSITIONS=519} [2024-06-21 15:52:11,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-21 15:52:11,782 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 519 transitions, 6304 flow [2024-06-21 15:52:11,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:11,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:11,782 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, 1, 1] [2024-06-21 15:52:11,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 15:52:11,782 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:11,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash 263273162, now seen corresponding path program 5 times [2024-06-21 15:52:11,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:11,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102039800] [2024-06-21 15:52:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:11,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:11,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:11,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102039800] [2024-06-21 15:52:11,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102039800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:11,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:11,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452637763] [2024-06-21 15:52:11,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:11,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:11,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:11,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 519 transitions, 6304 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:11,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:13,447 INFO L124 PetriNetUnfolderBase]: 4289/7234 cut-off events. [2024-06-21 15:52:13,447 INFO L125 PetriNetUnfolderBase]: For 1019020/1019032 co-relation queries the response was YES. [2024-06-21 15:52:13,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50872 conditions, 7234 events. 4289/7234 cut-off events. For 1019020/1019032 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 51503 event pairs, 941 based on Foata normal form. 30/7263 useless extension candidates. Maximal degree in co-relation 50668. Up to 5061 conditions per place. [2024-06-21 15:52:13,560 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 437 selfloop transitions, 119 changer transitions 8/571 dead transitions. [2024-06-21 15:52:13,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 571 transitions, 8298 flow [2024-06-21 15:52:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:52:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:52:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-21 15:52:13,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-21 15:52:13,560 INFO L175 Difference]: Start difference. First operand has 501 places, 519 transitions, 6304 flow. Second operand 12 states and 274 transitions. [2024-06-21 15:52:13,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 571 transitions, 8298 flow [2024-06-21 15:52:19,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 571 transitions, 8048 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 15:52:19,711 INFO L231 Difference]: Finished difference. Result has 499 places, 517 transitions, 6282 flow [2024-06-21 15:52:19,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6282, PETRI_PLACES=499, PETRI_TRANSITIONS=517} [2024-06-21 15:52:19,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-21 15:52:19,711 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 517 transitions, 6282 flow [2024-06-21 15:52:19,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:19,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:19,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:19,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 15:52:19,711 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:19,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1315498036, now seen corresponding path program 6 times [2024-06-21 15:52:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:19,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29492105] [2024-06-21 15:52:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:19,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:19,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29492105] [2024-06-21 15:52:19,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29492105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:19,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:19,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:19,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294275093] [2024-06-21 15:52:19,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:19,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:19,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:19,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:19,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:19,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:19,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 517 transitions, 6282 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:19,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:19,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:19,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:21,505 INFO L124 PetriNetUnfolderBase]: 4184/7043 cut-off events. [2024-06-21 15:52:21,506 INFO L125 PetriNetUnfolderBase]: For 857158/857170 co-relation queries the response was YES. [2024-06-21 15:52:21,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47630 conditions, 7043 events. 4184/7043 cut-off events. For 857158/857170 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49867 event pairs, 965 based on Foata normal form. 30/7072 useless extension candidates. Maximal degree in co-relation 47426. Up to 5061 conditions per place. [2024-06-21 15:52:21,794 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 115 changer transitions 20/564 dead transitions. [2024-06-21 15:52:21,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 564 transitions, 7940 flow [2024-06-21 15:52:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:52:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:52:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-21 15:52:21,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 15:52:21,795 INFO L175 Difference]: Start difference. First operand has 499 places, 517 transitions, 6282 flow. Second operand 12 states and 268 transitions. [2024-06-21 15:52:21,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 564 transitions, 7940 flow [2024-06-21 15:52:25,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 564 transitions, 7699 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 15:52:25,907 INFO L231 Difference]: Finished difference. Result has 499 places, 512 transitions, 6198 flow [2024-06-21 15:52:25,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6045, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6198, PETRI_PLACES=499, PETRI_TRANSITIONS=512} [2024-06-21 15:52:25,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-21 15:52:25,907 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 512 transitions, 6198 flow [2024-06-21 15:52:25,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:25,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:25,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:25,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 15:52:25,908 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:25,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1578527852, now seen corresponding path program 7 times [2024-06-21 15:52:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:25,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177648471] [2024-06-21 15:52:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:25,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:26,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:26,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177648471] [2024-06-21 15:52:26,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177648471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:26,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:26,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63401708] [2024-06-21 15:52:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:26,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:26,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 512 transitions, 6198 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:26,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:26,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:26,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:27,828 INFO L124 PetriNetUnfolderBase]: 4285/7200 cut-off events. [2024-06-21 15:52:27,828 INFO L125 PetriNetUnfolderBase]: For 1132571/1132579 co-relation queries the response was YES. [2024-06-21 15:52:27,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51947 conditions, 7200 events. 4285/7200 cut-off events. For 1132571/1132579 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51298 event pairs, 1238 based on Foata normal form. 32/7230 useless extension candidates. Maximal degree in co-relation 51744. Up to 5632 conditions per place. [2024-06-21 15:52:28,018 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 309 selfloop transitions, 223 changer transitions 19/558 dead transitions. [2024-06-21 15:52:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 558 transitions, 7838 flow [2024-06-21 15:52:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:52:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:52:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 292 transitions. [2024-06-21 15:52:28,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-21 15:52:28,019 INFO L175 Difference]: Start difference. First operand has 499 places, 512 transitions, 6198 flow. Second operand 13 states and 292 transitions. [2024-06-21 15:52:28,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 558 transitions, 7838 flow [2024-06-21 15:52:33,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 558 transitions, 7490 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 15:52:33,939 INFO L231 Difference]: Finished difference. Result has 493 places, 508 transitions, 6251 flow [2024-06-21 15:52:33,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6251, PETRI_PLACES=493, PETRI_TRANSITIONS=508} [2024-06-21 15:52:33,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-21 15:52:33,940 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 508 transitions, 6251 flow [2024-06-21 15:52:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:33,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:33,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 15:52:33,940 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:33,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1468299978, now seen corresponding path program 8 times [2024-06-21 15:52:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068685475] [2024-06-21 15:52:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068685475] [2024-06-21 15:52:34,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068685475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:34,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:34,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593035499] [2024-06-21 15:52:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:34,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:34,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 508 transitions, 6251 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:34,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:34,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:35,961 INFO L124 PetriNetUnfolderBase]: 4364/7368 cut-off events. [2024-06-21 15:52:35,961 INFO L125 PetriNetUnfolderBase]: For 1445978/1445986 co-relation queries the response was YES. [2024-06-21 15:52:36,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57905 conditions, 7368 events. 4364/7368 cut-off events. For 1445978/1445986 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 52871 event pairs, 1213 based on Foata normal form. 26/7392 useless extension candidates. Maximal degree in co-relation 57704. Up to 4899 conditions per place. [2024-06-21 15:52:36,068 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 227 changer transitions 16/558 dead transitions. [2024-06-21 15:52:36,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 558 transitions, 8187 flow [2024-06-21 15:52:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:52:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:52:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-21 15:52:36,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 15:52:36,069 INFO L175 Difference]: Start difference. First operand has 493 places, 508 transitions, 6251 flow. Second operand 12 states and 280 transitions. [2024-06-21 15:52:36,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 558 transitions, 8187 flow [2024-06-21 15:52:45,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 558 transitions, 7767 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 15:52:45,005 INFO L231 Difference]: Finished difference. Result has 490 places, 505 transitions, 6268 flow [2024-06-21 15:52:45,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6268, PETRI_PLACES=490, PETRI_TRANSITIONS=505} [2024-06-21 15:52:45,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-21 15:52:45,006 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 505 transitions, 6268 flow [2024-06-21 15:52:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:45,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:45,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:52:45,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 15:52:45,007 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:45,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash 111657814, now seen corresponding path program 9 times [2024-06-21 15:52:45,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:45,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889207229] [2024-06-21 15:52:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:45,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889207229] [2024-06-21 15:52:45,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889207229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:45,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:45,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148301140] [2024-06-21 15:52:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:45,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:45,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 505 transitions, 6268 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:45,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:45,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:45,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:46,971 INFO L124 PetriNetUnfolderBase]: 4293/7230 cut-off events. [2024-06-21 15:52:46,971 INFO L125 PetriNetUnfolderBase]: For 1428089/1428101 co-relation queries the response was YES. [2024-06-21 15:52:47,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57480 conditions, 7230 events. 4293/7230 cut-off events. For 1428089/1428101 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 51587 event pairs, 1220 based on Foata normal form. 30/7259 useless extension candidates. Maximal degree in co-relation 57280. Up to 5992 conditions per place. [2024-06-21 15:52:47,078 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 435 selfloop transitions, 100 changer transitions 12/554 dead transitions. [2024-06-21 15:52:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 554 transitions, 7902 flow [2024-06-21 15:52:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:52:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:52:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 302 transitions. [2024-06-21 15:52:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-21 15:52:47,079 INFO L175 Difference]: Start difference. First operand has 490 places, 505 transitions, 6268 flow. Second operand 14 states and 302 transitions. [2024-06-21 15:52:47,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 554 transitions, 7902 flow [2024-06-21 15:52:54,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 554 transitions, 7454 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 15:52:54,634 INFO L231 Difference]: Finished difference. Result has 490 places, 503 transitions, 6000 flow [2024-06-21 15:52:54,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6000, PETRI_PLACES=490, PETRI_TRANSITIONS=503} [2024-06-21 15:52:54,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-21 15:52:54,635 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 503 transitions, 6000 flow [2024-06-21 15:52:54,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:54,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:52:54,635 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, 1, 1] [2024-06-21 15:52:54,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 15:52:54,635 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:52:54,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:52:54,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1472019048, now seen corresponding path program 10 times [2024-06-21 15:52:54,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:52:54,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828368695] [2024-06-21 15:52:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:52:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:52:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:52:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:52:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:52:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828368695] [2024-06-21 15:52:54,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828368695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:52:54,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:52:54,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:52:54,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045039323] [2024-06-21 15:52:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:52:54,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:52:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:52:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:52:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:52:54,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:52:54,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 503 transitions, 6000 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:52:54,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:52:54,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:52:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:52:56,483 INFO L124 PetriNetUnfolderBase]: 4188/7043 cut-off events. [2024-06-21 15:52:56,483 INFO L125 PetriNetUnfolderBase]: For 1250423/1250435 co-relation queries the response was YES. [2024-06-21 15:52:56,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53942 conditions, 7043 events. 4188/7043 cut-off events. For 1250423/1250435 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 49985 event pairs, 1208 based on Foata normal form. 30/7072 useless extension candidates. Maximal degree in co-relation 53743. Up to 5992 conditions per place. [2024-06-21 15:52:56,585 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 419 selfloop transitions, 96 changer transitions 19/541 dead transitions. [2024-06-21 15:52:56,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 541 transitions, 7256 flow [2024-06-21 15:52:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:52:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:52:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-21 15:52:56,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-21 15:52:56,586 INFO L175 Difference]: Start difference. First operand has 490 places, 503 transitions, 6000 flow. Second operand 12 states and 261 transitions. [2024-06-21 15:52:56,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 541 transitions, 7256 flow [2024-06-21 15:53:03,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 541 transitions, 7026 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 15:53:03,879 INFO L231 Difference]: Finished difference. Result has 487 places, 499 transitions, 5920 flow [2024-06-21 15:53:03,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5920, PETRI_PLACES=487, PETRI_TRANSITIONS=499} [2024-06-21 15:53:03,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-21 15:53:03,879 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 499 transitions, 5920 flow [2024-06-21 15:53:03,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:03,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:03,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 15:53:03,880 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:03,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1844551562, now seen corresponding path program 11 times [2024-06-21 15:53:03,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:03,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778127526] [2024-06-21 15:53:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:03,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:03,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778127526] [2024-06-21 15:53:03,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778127526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:03,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:03,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:03,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391534464] [2024-06-21 15:53:03,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:03,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:03,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:04,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:04,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 499 transitions, 5920 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:04,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:04,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:04,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:05,725 INFO L124 PetriNetUnfolderBase]: 4180/7034 cut-off events. [2024-06-21 15:53:05,725 INFO L125 PetriNetUnfolderBase]: For 1317553/1317561 co-relation queries the response was YES. [2024-06-21 15:53:05,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53935 conditions, 7034 events. 4180/7034 cut-off events. For 1317553/1317561 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 50069 event pairs, 1319 based on Foata normal form. 34/7066 useless extension candidates. Maximal degree in co-relation 53736. Up to 6058 conditions per place. [2024-06-21 15:53:05,826 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 219 changer transitions 12/531 dead transitions. [2024-06-21 15:53:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 531 transitions, 7104 flow [2024-06-21 15:53:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:53:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:53:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-21 15:53:05,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-21 15:53:05,827 INFO L175 Difference]: Start difference. First operand has 487 places, 499 transitions, 5920 flow. Second operand 13 states and 281 transitions. [2024-06-21 15:53:05,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 531 transitions, 7104 flow [2024-06-21 15:53:13,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 531 transitions, 6906 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 15:53:13,224 INFO L231 Difference]: Finished difference. Result has 482 places, 495 transitions, 6137 flow [2024-06-21 15:53:13,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6137, PETRI_PLACES=482, PETRI_TRANSITIONS=495} [2024-06-21 15:53:13,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-21 15:53:13,224 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 495 transitions, 6137 flow [2024-06-21 15:53:13,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:13,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:13,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:13,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 15:53:13,224 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:13,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:13,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1844225132, now seen corresponding path program 12 times [2024-06-21 15:53:13,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:13,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023102532] [2024-06-21 15:53:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:13,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:13,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:13,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023102532] [2024-06-21 15:53:13,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023102532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:13,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:13,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:13,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936146356] [2024-06-21 15:53:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:13,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 495 transitions, 6137 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:13,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:13,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:13,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:15,133 INFO L124 PetriNetUnfolderBase]: 4165/7023 cut-off events. [2024-06-21 15:53:15,133 INFO L125 PetriNetUnfolderBase]: For 1280538/1280546 co-relation queries the response was YES. [2024-06-21 15:53:15,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53825 conditions, 7023 events. 4165/7023 cut-off events. For 1280538/1280546 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 50132 event pairs, 1281 based on Foata normal form. 32/7053 useless extension candidates. Maximal degree in co-relation 53628. Up to 6010 conditions per place. [2024-06-21 15:53:15,234 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 215 changer transitions 21/531 dead transitions. [2024-06-21 15:53:15,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 531 transitions, 7369 flow [2024-06-21 15:53:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:53:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:53:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-21 15:53:15,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-21 15:53:15,235 INFO L175 Difference]: Start difference. First operand has 482 places, 495 transitions, 6137 flow. Second operand 13 states and 282 transitions. [2024-06-21 15:53:15,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 531 transitions, 7369 flow [2024-06-21 15:53:23,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 531 transitions, 6927 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 15:53:23,083 INFO L231 Difference]: Finished difference. Result has 480 places, 490 transitions, 6074 flow [2024-06-21 15:53:23,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6074, PETRI_PLACES=480, PETRI_TRANSITIONS=490} [2024-06-21 15:53:23,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 15:53:23,083 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 490 transitions, 6074 flow [2024-06-21 15:53:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:23,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:23,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 15:53:23,084 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:23,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1123284106, now seen corresponding path program 13 times [2024-06-21 15:53:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393495273] [2024-06-21 15:53:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:23,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393495273] [2024-06-21 15:53:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393495273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:23,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845525329] [2024-06-21 15:53:23,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:23,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:23,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 490 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:23,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:23,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:23,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:24,920 INFO L124 PetriNetUnfolderBase]: 4255/7152 cut-off events. [2024-06-21 15:53:24,921 INFO L125 PetriNetUnfolderBase]: For 1483734/1483746 co-relation queries the response was YES. [2024-06-21 15:53:25,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57886 conditions, 7152 events. 4255/7152 cut-off events. For 1483734/1483746 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51031 event pairs, 1327 based on Foata normal form. 36/7187 useless extension candidates. Maximal degree in co-relation 57690. Up to 6136 conditions per place. [2024-06-21 15:53:25,024 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 90 changer transitions 10/526 dead transitions. [2024-06-21 15:53:25,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 526 transitions, 7578 flow [2024-06-21 15:53:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:53:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:53:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-21 15:53:25,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-21 15:53:25,025 INFO L175 Difference]: Start difference. First operand has 480 places, 490 transitions, 6074 flow. Second operand 13 states and 279 transitions. [2024-06-21 15:53:25,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 526 transitions, 7578 flow [2024-06-21 15:53:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 526 transitions, 7132 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 15:53:32,655 INFO L231 Difference]: Finished difference. Result has 475 places, 487 transitions, 5766 flow [2024-06-21 15:53:32,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5766, PETRI_PLACES=475, PETRI_TRANSITIONS=487} [2024-06-21 15:53:32,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 15:53:32,656 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 487 transitions, 5766 flow [2024-06-21 15:53:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:32,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:32,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:32,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 15:53:32,656 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:32,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -402637474, now seen corresponding path program 14 times [2024-06-21 15:53:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039120624] [2024-06-21 15:53:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:32,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039120624] [2024-06-21 15:53:32,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039120624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:32,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:32,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695584283] [2024-06-21 15:53:32,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:32,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:32,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:32,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:32,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 487 transitions, 5766 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:32,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:32,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:32,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:34,648 INFO L124 PetriNetUnfolderBase]: 4398/7411 cut-off events. [2024-06-21 15:53:34,648 INFO L125 PetriNetUnfolderBase]: For 1739003/1739015 co-relation queries the response was YES. [2024-06-21 15:53:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63800 conditions, 7411 events. 4398/7411 cut-off events. For 1739003/1739015 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 53375 event pairs, 1417 based on Foata normal form. 30/7440 useless extension candidates. Maximal degree in co-relation 63606. Up to 6010 conditions per place. [2024-06-21 15:53:34,759 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 423 selfloop transitions, 91 changer transitions 8/529 dead transitions. [2024-06-21 15:53:34,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 529 transitions, 7560 flow [2024-06-21 15:53:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:53:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:53:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 301 transitions. [2024-06-21 15:53:34,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 15:53:34,760 INFO L175 Difference]: Start difference. First operand has 475 places, 487 transitions, 5766 flow. Second operand 14 states and 301 transitions. [2024-06-21 15:53:34,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 529 transitions, 7560 flow [2024-06-21 15:53:40,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 529 transitions, 7372 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 15:53:40,259 INFO L231 Difference]: Finished difference. Result has 475 places, 485 transitions, 5737 flow [2024-06-21 15:53:40,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5737, PETRI_PLACES=475, PETRI_TRANSITIONS=485} [2024-06-21 15:53:40,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 15:53:40,259 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 485 transitions, 5737 flow [2024-06-21 15:53:40,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:40,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:40,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:40,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 15:53:40,260 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:40,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1123610536, now seen corresponding path program 15 times [2024-06-21 15:53:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524096592] [2024-06-21 15:53:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:40,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524096592] [2024-06-21 15:53:40,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524096592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:40,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:40,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:40,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324729287] [2024-06-21 15:53:40,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:40,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:40,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:40,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:40,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 485 transitions, 5737 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:40,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:40,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:40,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:42,141 INFO L124 PetriNetUnfolderBase]: 4402/7421 cut-off events. [2024-06-21 15:53:42,141 INFO L125 PetriNetUnfolderBase]: For 1806480/1806492 co-relation queries the response was YES. [2024-06-21 15:53:42,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63892 conditions, 7421 events. 4402/7421 cut-off events. For 1806480/1806492 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53514 event pairs, 1526 based on Foata normal form. 38/7458 useless extension candidates. Maximal degree in co-relation 63698. Up to 6632 conditions per place. [2024-06-21 15:53:42,257 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 86 changer transitions 13/514 dead transitions. [2024-06-21 15:53:42,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 514 transitions, 6879 flow [2024-06-21 15:53:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:53:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:53:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-21 15:53:42,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-06-21 15:53:42,258 INFO L175 Difference]: Start difference. First operand has 475 places, 485 transitions, 5737 flow. Second operand 13 states and 274 transitions. [2024-06-21 15:53:42,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 514 transitions, 6879 flow [2024-06-21 15:53:48,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 514 transitions, 6694 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 15:53:48,031 INFO L231 Difference]: Finished difference. Result has 474 places, 480 transitions, 5671 flow [2024-06-21 15:53:48,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5671, PETRI_PLACES=474, PETRI_TRANSITIONS=480} [2024-06-21 15:53:48,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-21 15:53:48,031 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 480 transitions, 5671 flow [2024-06-21 15:53:48,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:48,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:48,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:48,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 15:53:48,032 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:48,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1118700136, now seen corresponding path program 16 times [2024-06-21 15:53:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:48,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308072834] [2024-06-21 15:53:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:48,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:48,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308072834] [2024-06-21 15:53:48,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308072834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:48,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:48,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:48,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727034697] [2024-06-21 15:53:48,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:48,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:48,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:48,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:48,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 480 transitions, 5671 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:48,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:48,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:48,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:49,886 INFO L124 PetriNetUnfolderBase]: 4285/7214 cut-off events. [2024-06-21 15:53:49,887 INFO L125 PetriNetUnfolderBase]: For 1588738/1588750 co-relation queries the response was YES. [2024-06-21 15:53:49,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60474 conditions, 7214 events. 4285/7214 cut-off events. For 1588738/1588750 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51596 event pairs, 1327 based on Foata normal form. 30/7243 useless extension candidates. Maximal degree in co-relation 60280. Up to 6010 conditions per place. [2024-06-21 15:53:49,990 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 421 selfloop transitions, 86 changer transitions 9/523 dead transitions. [2024-06-21 15:53:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 523 transitions, 7477 flow [2024-06-21 15:53:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:53:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:53:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 299 transitions. [2024-06-21 15:53:49,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339285714285714 [2024-06-21 15:53:49,991 INFO L175 Difference]: Start difference. First operand has 474 places, 480 transitions, 5671 flow. Second operand 14 states and 299 transitions. [2024-06-21 15:53:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 523 transitions, 7477 flow [2024-06-21 15:53:57,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 523 transitions, 7293 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 15:53:57,936 INFO L231 Difference]: Finished difference. Result has 472 places, 477 transitions, 5626 flow [2024-06-21 15:53:57,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5626, PETRI_PLACES=472, PETRI_TRANSITIONS=477} [2024-06-21 15:53:57,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-21 15:53:57,936 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 477 transitions, 5626 flow [2024-06-21 15:53:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:57,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:53:57,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:53:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 15:53:57,937 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:53:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:53:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1128825046, now seen corresponding path program 17 times [2024-06-21 15:53:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:53:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297914437] [2024-06-21 15:53:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:53:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:53:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:53:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:53:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:53:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297914437] [2024-06-21 15:53:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297914437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:53:58,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:53:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:53:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67685367] [2024-06-21 15:53:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:53:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:53:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:53:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:53:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:53:58,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:53:58,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 477 transitions, 5626 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:53:58,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:53:58,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:53:58,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:53:59,732 INFO L124 PetriNetUnfolderBase]: 4165/7014 cut-off events. [2024-06-21 15:53:59,732 INFO L125 PetriNetUnfolderBase]: For 1439546/1439558 co-relation queries the response was YES. [2024-06-21 15:53:59,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56401 conditions, 7014 events. 4165/7014 cut-off events. For 1439546/1439558 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 49938 event pairs, 1321 based on Foata normal form. 36/7049 useless extension candidates. Maximal degree in co-relation 56208. Up to 6010 conditions per place. [2024-06-21 15:53:59,828 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 413 selfloop transitions, 83 changer transitions 10/513 dead transitions. [2024-06-21 15:53:59,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 513 transitions, 7100 flow [2024-06-21 15:53:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:53:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:53:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-21 15:53:59,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-21 15:53:59,829 INFO L175 Difference]: Start difference. First operand has 472 places, 477 transitions, 5626 flow. Second operand 13 states and 276 transitions. [2024-06-21 15:53:59,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 513 transitions, 7100 flow [2024-06-21 15:54:06,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 513 transitions, 6921 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 15:54:06,782 INFO L231 Difference]: Finished difference. Result has 468 places, 474 transitions, 5571 flow [2024-06-21 15:54:06,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5571, PETRI_PLACES=468, PETRI_TRANSITIONS=474} [2024-06-21 15:54:06,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-21 15:54:06,783 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 474 transitions, 5571 flow [2024-06-21 15:54:06,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:06,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:06,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 15:54:06,783 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:54:06,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1128972916, now seen corresponding path program 18 times [2024-06-21 15:54:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186092146] [2024-06-21 15:54:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:06,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:06,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:06,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186092146] [2024-06-21 15:54:06,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186092146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:06,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:06,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:54:06,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008271273] [2024-06-21 15:54:06,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:06,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:54:06,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:54:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:54:06,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:54:06,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 474 transitions, 5571 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:06,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:06,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:54:06,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:08,532 INFO L124 PetriNetUnfolderBase]: 4014/6745 cut-off events. [2024-06-21 15:54:08,532 INFO L125 PetriNetUnfolderBase]: For 1243851/1243863 co-relation queries the response was YES. [2024-06-21 15:54:08,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51564 conditions, 6745 events. 4014/6745 cut-off events. For 1243851/1243863 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 47598 event pairs, 1266 based on Foata normal form. 38/6782 useless extension candidates. Maximal degree in co-relation 51372. Up to 6010 conditions per place. [2024-06-21 15:54:08,623 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 399 selfloop transitions, 76 changer transitions 20/502 dead transitions. [2024-06-21 15:54:08,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 502 transitions, 6687 flow [2024-06-21 15:54:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:54:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:54:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-21 15:54:08,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-21 15:54:08,624 INFO L175 Difference]: Start difference. First operand has 468 places, 474 transitions, 5571 flow. Second operand 12 states and 251 transitions. [2024-06-21 15:54:08,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 502 transitions, 6687 flow [2024-06-21 15:54:14,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 502 transitions, 6464 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 15:54:14,393 INFO L231 Difference]: Finished difference. Result has 465 places, 467 transitions, 5424 flow [2024-06-21 15:54:14,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5424, PETRI_PLACES=465, PETRI_TRANSITIONS=467} [2024-06-21 15:54:14,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-21 15:54:14,393 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 467 transitions, 5424 flow [2024-06-21 15:54:14,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:14,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:14,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 15:54:14,394 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:54:14,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1085791638, now seen corresponding path program 19 times [2024-06-21 15:54:14,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:14,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535437699] [2024-06-21 15:54:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:14,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:14,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535437699] [2024-06-21 15:54:14,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535437699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:14,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:14,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:54:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083507479] [2024-06-21 15:54:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:14,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:54:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:54:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:54:14,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:54:14,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 467 transitions, 5424 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:14,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:14,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:54:14,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:16,496 INFO L124 PetriNetUnfolderBase]: 4845/8197 cut-off events. [2024-06-21 15:54:16,496 INFO L125 PetriNetUnfolderBase]: For 2687665/2687676 co-relation queries the response was YES. [2024-06-21 15:54:16,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82267 conditions, 8197 events. 4845/8197 cut-off events. For 2687665/2687676 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 60346 event pairs, 1614 based on Foata normal form. 29/8225 useless extension candidates. Maximal degree in co-relation 82076. Up to 5317 conditions per place. [2024-06-21 15:54:16,625 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 389 selfloop transitions, 100 changer transitions 13/509 dead transitions. [2024-06-21 15:54:16,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 509 transitions, 7220 flow [2024-06-21 15:54:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:54:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:54:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-21 15:54:16,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-21 15:54:16,626 INFO L175 Difference]: Start difference. First operand has 465 places, 467 transitions, 5424 flow. Second operand 13 states and 285 transitions. [2024-06-21 15:54:16,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 509 transitions, 7220 flow [2024-06-21 15:54:24,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 509 transitions, 7038 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 15:54:24,579 INFO L231 Difference]: Finished difference. Result has 458 places, 464 transitions, 5397 flow [2024-06-21 15:54:24,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5397, PETRI_PLACES=458, PETRI_TRANSITIONS=464} [2024-06-21 15:54:24,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-21 15:54:24,579 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 464 transitions, 5397 flow [2024-06-21 15:54:24,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:24,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:24,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 15:54:24,579 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:54:24,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1292052726, now seen corresponding path program 20 times [2024-06-21 15:54:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:24,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068089616] [2024-06-21 15:54:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:24,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068089616] [2024-06-21 15:54:24,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068089616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:24,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:24,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:54:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500940402] [2024-06-21 15:54:24,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:24,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:54:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:54:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:54:24,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:54:24,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 464 transitions, 5397 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:24,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:24,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:54:24,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:26,828 INFO L124 PetriNetUnfolderBase]: 4801/8115 cut-off events. [2024-06-21 15:54:26,828 INFO L125 PetriNetUnfolderBase]: For 2689132/2689143 co-relation queries the response was YES. [2024-06-21 15:54:26,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 8115 events. 4801/8115 cut-off events. For 2689132/2689143 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 59483 event pairs, 1701 based on Foata normal form. 29/8143 useless extension candidates. Maximal degree in co-relation 81724. Up to 5317 conditions per place. [2024-06-21 15:54:26,978 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 396 selfloop transitions, 96 changer transitions 8/507 dead transitions. [2024-06-21 15:54:26,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 507 transitions, 7213 flow [2024-06-21 15:54:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:54:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:54:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-21 15:54:26,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:54:26,980 INFO L175 Difference]: Start difference. First operand has 458 places, 464 transitions, 5397 flow. Second operand 13 states and 286 transitions. [2024-06-21 15:54:26,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 507 transitions, 7213 flow [2024-06-21 15:54:34,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 507 transitions, 7011 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 15:54:34,558 INFO L231 Difference]: Finished difference. Result has 456 places, 462 transitions, 5370 flow [2024-06-21 15:54:34,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5370, PETRI_PLACES=456, PETRI_TRANSITIONS=462} [2024-06-21 15:54:34,559 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 15:54:34,559 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 462 transitions, 5370 flow [2024-06-21 15:54:34,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:34,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:34,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:34,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 15:54:34,559 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:54:34,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:34,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2142567214, now seen corresponding path program 21 times [2024-06-21 15:54:34,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:34,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566869689] [2024-06-21 15:54:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:34,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:34,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:34,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566869689] [2024-06-21 15:54:34,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566869689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:34,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:34,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:54:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050909399] [2024-06-21 15:54:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:54:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:54:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:54:34,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:54:34,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 462 transitions, 5370 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:34,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:34,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:54:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:36,639 INFO L124 PetriNetUnfolderBase]: 4683/7919 cut-off events. [2024-06-21 15:54:36,639 INFO L125 PetriNetUnfolderBase]: For 2538907/2538918 co-relation queries the response was YES. [2024-06-21 15:54:36,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77887 conditions, 7919 events. 4683/7919 cut-off events. For 2538907/2538918 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 58041 event pairs, 1772 based on Foata normal form. 35/7953 useless extension candidates. Maximal degree in co-relation 77698. Up to 6852 conditions per place. [2024-06-21 15:54:36,769 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 92 changer transitions 10/496 dead transitions. [2024-06-21 15:54:36,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 496 transitions, 6804 flow [2024-06-21 15:54:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:54:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:54:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 296 transitions. [2024-06-21 15:54:36,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-21 15:54:36,770 INFO L175 Difference]: Start difference. First operand has 456 places, 462 transitions, 5370 flow. Second operand 14 states and 296 transitions. [2024-06-21 15:54:36,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 496 transitions, 6804 flow [2024-06-21 15:54:44,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 496 transitions, 6608 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 15:54:44,212 INFO L231 Difference]: Finished difference. Result has 456 places, 459 transitions, 5316 flow [2024-06-21 15:54:44,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5316, PETRI_PLACES=456, PETRI_TRANSITIONS=459} [2024-06-21 15:54:44,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 15:54:44,212 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 459 transitions, 5316 flow [2024-06-21 15:54:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:44,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:44,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:44,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 15:54:44,212 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:54:44,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -470994328, now seen corresponding path program 22 times [2024-06-21 15:54:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:44,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566166145] [2024-06-21 15:54:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:44,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566166145] [2024-06-21 15:54:44,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566166145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:44,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:44,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:54:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500134892] [2024-06-21 15:54:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:54:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:54:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:54:44,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:54:44,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 459 transitions, 5316 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:44,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:44,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:54:44,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:46,174 INFO L124 PetriNetUnfolderBase]: 4504/7630 cut-off events. [2024-06-21 15:54:46,175 INFO L125 PetriNetUnfolderBase]: For 2271572/2271583 co-relation queries the response was YES. [2024-06-21 15:54:46,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72778 conditions, 7630 events. 4504/7630 cut-off events. For 2271572/2271583 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 55489 event pairs, 1550 based on Foata normal form. 29/7658 useless extension candidates. Maximal degree in co-relation 72590. Up to 6152 conditions per place. [2024-06-21 15:54:46,286 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 390 selfloop transitions, 95 changer transitions 8/500 dead transitions. [2024-06-21 15:54:46,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 500 transitions, 7070 flow [2024-06-21 15:54:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 15:54:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 15:54:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 319 transitions. [2024-06-21 15:54:46,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316666666666666 [2024-06-21 15:54:46,288 INFO L175 Difference]: Start difference. First operand has 456 places, 459 transitions, 5316 flow. Second operand 15 states and 319 transitions. [2024-06-21 15:54:46,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 500 transitions, 7070 flow [2024-06-21 15:54:54,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 500 transitions, 6878 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 15:54:54,007 INFO L231 Difference]: Finished difference. Result has 456 places, 457 transitions, 5298 flow [2024-06-21 15:54:54,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5298, PETRI_PLACES=456, PETRI_TRANSITIONS=457} [2024-06-21 15:54:54,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 15:54:54,007 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 457 transitions, 5298 flow [2024-06-21 15:54:54,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:54,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:54:54,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:54:54,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 15:54:54,008 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:54:54,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:54:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1985868360, now seen corresponding path program 23 times [2024-06-21 15:54:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:54:54,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807453156] [2024-06-21 15:54:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:54:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:54:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:54:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:54:54,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:54:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807453156] [2024-06-21 15:54:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807453156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:54:54,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:54:54,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:54:54,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121603163] [2024-06-21 15:54:54,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:54:54,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:54:54,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:54:54,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:54:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:54:54,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:54:54,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 457 transitions, 5298 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:54:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:54:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:54:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:54:55,915 INFO L124 PetriNetUnfolderBase]: 4627/7831 cut-off events. [2024-06-21 15:54:55,915 INFO L125 PetriNetUnfolderBase]: For 2537668/2537679 co-relation queries the response was YES. [2024-06-21 15:54:56,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 7831 events. 4627/7831 cut-off events. For 2537668/2537679 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57321 event pairs, 1762 based on Foata normal form. 35/7865 useless extension candidates. Maximal degree in co-relation 77174. Up to 6780 conditions per place. [2024-06-21 15:54:56,209 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 383 selfloop transitions, 91 changer transitions 10/491 dead transitions. [2024-06-21 15:54:56,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 491 transitions, 6722 flow [2024-06-21 15:54:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:54:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:54:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 294 transitions. [2024-06-21 15:54:56,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 15:54:56,210 INFO L175 Difference]: Start difference. First operand has 456 places, 457 transitions, 5298 flow. Second operand 14 states and 294 transitions. [2024-06-21 15:54:56,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 491 transitions, 6722 flow [2024-06-21 15:55:04,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 491 transitions, 6529 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 15:55:04,046 INFO L231 Difference]: Finished difference. Result has 455 places, 454 transitions, 5246 flow [2024-06-21 15:55:04,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5246, PETRI_PLACES=455, PETRI_TRANSITIONS=454} [2024-06-21 15:55:04,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-21 15:55:04,047 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 454 transitions, 5246 flow [2024-06-21 15:55:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:04,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:04,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:04,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 15:55:04,047 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:04,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -470988748, now seen corresponding path program 24 times [2024-06-21 15:55:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:04,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005928626] [2024-06-21 15:55:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005928626] [2024-06-21 15:55:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005928626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:04,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181141591] [2024-06-21 15:55:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:04,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:04,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:04,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 454 transitions, 5246 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:04,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:04,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:04,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:05,964 INFO L124 PetriNetUnfolderBase]: 4494/7590 cut-off events. [2024-06-21 15:55:05,964 INFO L125 PetriNetUnfolderBase]: For 2342507/2342518 co-relation queries the response was YES. [2024-06-21 15:55:06,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73754 conditions, 7590 events. 4494/7590 cut-off events. For 2342507/2342518 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 54982 event pairs, 1677 based on Foata normal form. 29/7618 useless extension candidates. Maximal degree in co-relation 73566. Up to 6152 conditions per place. [2024-06-21 15:55:06,076 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 382 selfloop transitions, 89 changer transitions 13/491 dead transitions. [2024-06-21 15:55:06,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 491 transitions, 6676 flow [2024-06-21 15:55:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 15:55:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 15:55:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 315 transitions. [2024-06-21 15:55:06,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 15:55:06,077 INFO L175 Difference]: Start difference. First operand has 455 places, 454 transitions, 5246 flow. Second operand 15 states and 315 transitions. [2024-06-21 15:55:06,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 491 transitions, 6676 flow [2024-06-21 15:55:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 491 transitions, 6491 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 15:55:13,380 INFO L231 Difference]: Finished difference. Result has 456 places, 451 transitions, 5199 flow [2024-06-21 15:55:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5199, PETRI_PLACES=456, PETRI_TRANSITIONS=451} [2024-06-21 15:55:13,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 15:55:13,380 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 451 transitions, 5199 flow [2024-06-21 15:55:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:13,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:13,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:13,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 15:55:13,380 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:13,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1985720490, now seen corresponding path program 25 times [2024-06-21 15:55:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321982118] [2024-06-21 15:55:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:13,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321982118] [2024-06-21 15:55:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321982118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:13,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:13,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:13,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166889576] [2024-06-21 15:55:13,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:13,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:13,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:13,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 451 transitions, 5199 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:13,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:13,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:13,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:15,218 INFO L124 PetriNetUnfolderBase]: 4369/7381 cut-off events. [2024-06-21 15:55:15,218 INFO L125 PetriNetUnfolderBase]: For 2193652/2193663 co-relation queries the response was YES. [2024-06-21 15:55:15,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69286 conditions, 7381 events. 4369/7381 cut-off events. For 2193652/2193663 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 53355 event pairs, 1636 based on Foata normal form. 37/7417 useless extension candidates. Maximal degree in co-relation 69098. Up to 6603 conditions per place. [2024-06-21 15:55:15,324 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 371 selfloop transitions, 85 changer transitions 14/477 dead transitions. [2024-06-21 15:55:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 477 transitions, 6259 flow [2024-06-21 15:55:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:55:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:55:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-21 15:55:15,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173076923076924 [2024-06-21 15:55:15,325 INFO L175 Difference]: Start difference. First operand has 456 places, 451 transitions, 5199 flow. Second operand 13 states and 269 transitions. [2024-06-21 15:55:15,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 477 transitions, 6259 flow [2024-06-21 15:55:21,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 477 transitions, 6084 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 15:55:21,560 INFO L231 Difference]: Finished difference. Result has 453 places, 446 transitions, 5141 flow [2024-06-21 15:55:21,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5141, PETRI_PLACES=453, PETRI_TRANSITIONS=446} [2024-06-21 15:55:21,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-21 15:55:21,561 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 446 transitions, 5141 flow [2024-06-21 15:55:21,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:21,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:21,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:21,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 15:55:21,561 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:21,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash 467129024, now seen corresponding path program 26 times [2024-06-21 15:55:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:21,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460238551] [2024-06-21 15:55:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:21,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:21,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:21,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460238551] [2024-06-21 15:55:21,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460238551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:21,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:21,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:21,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129128921] [2024-06-21 15:55:21,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:21,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:21,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:21,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:21,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 446 transitions, 5141 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:21,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:21,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:23,451 INFO L124 PetriNetUnfolderBase]: 4366/7374 cut-off events. [2024-06-21 15:55:23,452 INFO L125 PetriNetUnfolderBase]: For 2191365/2191376 co-relation queries the response was YES. [2024-06-21 15:55:23,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69508 conditions, 7374 events. 4366/7374 cut-off events. For 2191365/2191376 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 53130 event pairs, 1573 based on Foata normal form. 35/7408 useless extension candidates. Maximal degree in co-relation 69320. Up to 5814 conditions per place. [2024-06-21 15:55:23,560 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 377 selfloop transitions, 82 changer transitions 17/483 dead transitions. [2024-06-21 15:55:23,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 483 transitions, 6599 flow [2024-06-21 15:55:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:55:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:55:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 278 transitions. [2024-06-21 15:55:23,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346153846153846 [2024-06-21 15:55:23,561 INFO L175 Difference]: Start difference. First operand has 453 places, 446 transitions, 5141 flow. Second operand 13 states and 278 transitions. [2024-06-21 15:55:23,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 483 transitions, 6599 flow [2024-06-21 15:55:29,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 483 transitions, 6419 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 15:55:29,603 INFO L231 Difference]: Finished difference. Result has 450 places, 441 transitions, 5024 flow [2024-06-21 15:55:29,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5024, PETRI_PLACES=450, PETRI_TRANSITIONS=441} [2024-06-21 15:55:29,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-21 15:55:29,604 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 441 transitions, 5024 flow [2024-06-21 15:55:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:29,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:29,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:29,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 15:55:29,604 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:29,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -466083928, now seen corresponding path program 27 times [2024-06-21 15:55:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155969799] [2024-06-21 15:55:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:29,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:29,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155969799] [2024-06-21 15:55:29,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155969799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:29,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:29,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:29,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855587278] [2024-06-21 15:55:29,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:29,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:29,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 441 transitions, 5024 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:29,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:29,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:29,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:31,339 INFO L124 PetriNetUnfolderBase]: 4313/7281 cut-off events. [2024-06-21 15:55:31,339 INFO L125 PetriNetUnfolderBase]: For 2215282/2215293 co-relation queries the response was YES. [2024-06-21 15:55:31,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68856 conditions, 7281 events. 4313/7281 cut-off events. For 2215282/2215293 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 52428 event pairs, 1613 based on Foata normal form. 37/7317 useless extension candidates. Maximal degree in co-relation 68668. Up to 6524 conditions per place. [2024-06-21 15:55:31,615 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 371 selfloop transitions, 77 changer transitions 13/468 dead transitions. [2024-06-21 15:55:31,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 468 transitions, 6068 flow [2024-06-21 15:55:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 15:55:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 15:55:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 289 transitions. [2024-06-21 15:55:31,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160714285714286 [2024-06-21 15:55:31,616 INFO L175 Difference]: Start difference. First operand has 450 places, 441 transitions, 5024 flow. Second operand 14 states and 289 transitions. [2024-06-21 15:55:31,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 468 transitions, 6068 flow [2024-06-21 15:55:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 468 transitions, 5902 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 15:55:37,305 INFO L231 Difference]: Finished difference. Result has 447 places, 436 transitions, 4955 flow [2024-06-21 15:55:37,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4858, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4955, PETRI_PLACES=447, PETRI_TRANSITIONS=436} [2024-06-21 15:55:37,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-21 15:55:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 436 transitions, 4955 flow [2024-06-21 15:55:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:37,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:37,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 15:55:37,306 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:37,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash -470696728, now seen corresponding path program 28 times [2024-06-21 15:55:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:37,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029030383] [2024-06-21 15:55:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:37,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029030383] [2024-06-21 15:55:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029030383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:37,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:37,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239100602] [2024-06-21 15:55:37,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:37,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:37,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 436 transitions, 4955 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:37,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:37,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:37,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:39,129 INFO L124 PetriNetUnfolderBase]: 4178/7052 cut-off events. [2024-06-21 15:55:39,129 INFO L125 PetriNetUnfolderBase]: For 1996599/1996610 co-relation queries the response was YES. [2024-06-21 15:55:39,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64223 conditions, 7052 events. 4178/7052 cut-off events. For 1996599/1996610 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 50418 event pairs, 1528 based on Foata normal form. 37/7088 useless extension candidates. Maximal degree in co-relation 64036. Up to 6313 conditions per place. [2024-06-21 15:55:39,232 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 370 selfloop transitions, 73 changer transitions 12/462 dead transitions. [2024-06-21 15:55:39,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 462 transitions, 5985 flow [2024-06-21 15:55:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:55:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:55:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-21 15:55:39,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173076923076924 [2024-06-21 15:55:39,233 INFO L175 Difference]: Start difference. First operand has 447 places, 436 transitions, 4955 flow. Second operand 13 states and 269 transitions. [2024-06-21 15:55:39,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 462 transitions, 5985 flow [2024-06-21 15:55:44,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 462 transitions, 5817 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-21 15:55:44,221 INFO L231 Difference]: Finished difference. Result has 443 places, 432 transitions, 4888 flow [2024-06-21 15:55:44,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4888, PETRI_PLACES=443, PETRI_TRANSITIONS=432} [2024-06-21 15:55:44,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-21 15:55:44,222 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 432 transitions, 4888 flow [2024-06-21 15:55:44,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:44,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:44,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 15:55:44,222 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:44,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2146857304, now seen corresponding path program 29 times [2024-06-21 15:55:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40527402] [2024-06-21 15:55:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:44,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40527402] [2024-06-21 15:55:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40527402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938289824] [2024-06-21 15:55:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:44,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:44,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 432 transitions, 4888 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:44,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:44,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:44,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:45,840 INFO L124 PetriNetUnfolderBase]: 4049/6843 cut-off events. [2024-06-21 15:55:45,840 INFO L125 PetriNetUnfolderBase]: For 1777778/1777789 co-relation queries the response was YES. [2024-06-21 15:55:45,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59932 conditions, 6843 events. 4049/6843 cut-off events. For 1777778/1777789 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 48716 event pairs, 1404 based on Foata normal form. 35/6877 useless extension candidates. Maximal degree in co-relation 59746. Up to 6079 conditions per place. [2024-06-21 15:55:45,935 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 367 selfloop transitions, 69 changer transitions 19/462 dead transitions. [2024-06-21 15:55:45,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 462 transitions, 5970 flow [2024-06-21 15:55:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:55:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:55:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-21 15:55:45,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 15:55:45,936 INFO L175 Difference]: Start difference. First operand has 443 places, 432 transitions, 4888 flow. Second operand 13 states and 270 transitions. [2024-06-21 15:55:45,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 462 transitions, 5970 flow [2024-06-21 15:55:50,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 462 transitions, 5763 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 15:55:50,722 INFO L231 Difference]: Finished difference. Result has 440 places, 427 transitions, 4753 flow [2024-06-21 15:55:50,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4753, PETRI_PLACES=440, PETRI_TRANSITIONS=427} [2024-06-21 15:55:50,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-21 15:55:50,722 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 427 transitions, 4753 flow [2024-06-21 15:55:50,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:50,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:50,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 15:55:50,722 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:50,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1078439988, now seen corresponding path program 30 times [2024-06-21 15:55:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:50,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145277526] [2024-06-21 15:55:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:50,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:50,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145277526] [2024-06-21 15:55:50,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145277526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:50,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:50,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009984812] [2024-06-21 15:55:50,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:50,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:50,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:50,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 427 transitions, 4753 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:50,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:50,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:50,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:55:52,315 INFO L124 PetriNetUnfolderBase]: 3914/6618 cut-off events. [2024-06-21 15:55:52,316 INFO L125 PetriNetUnfolderBase]: For 1582478/1582489 co-relation queries the response was YES. [2024-06-21 15:55:52,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56191 conditions, 6618 events. 3914/6618 cut-off events. For 1582478/1582489 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 46699 event pairs, 1335 based on Foata normal form. 29/6646 useless extension candidates. Maximal degree in co-relation 56006. Up to 5317 conditions per place. [2024-06-21 15:55:52,409 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 66 changer transitions 21/463 dead transitions. [2024-06-21 15:55:52,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 463 transitions, 6125 flow [2024-06-21 15:55:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 15:55:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 15:55:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-21 15:55:52,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-21 15:55:52,410 INFO L175 Difference]: Start difference. First operand has 440 places, 427 transitions, 4753 flow. Second operand 13 states and 276 transitions. [2024-06-21 15:55:52,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 463 transitions, 6125 flow [2024-06-21 15:55:58,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 463 transitions, 5965 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 15:55:58,734 INFO L231 Difference]: Finished difference. Result has 434 places, 421 transitions, 4630 flow [2024-06-21 15:55:58,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4630, PETRI_PLACES=434, PETRI_TRANSITIONS=421} [2024-06-21 15:55:58,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-21 15:55:58,734 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 421 transitions, 4630 flow [2024-06-21 15:55:58,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:58,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:55:58,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:55:58,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 15:55:58,735 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:55:58,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:55:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1680833730, now seen corresponding path program 31 times [2024-06-21 15:55:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:55:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058056438] [2024-06-21 15:55:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:55:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:55:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:55:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:55:58,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:55:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058056438] [2024-06-21 15:55:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058056438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:55:58,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:55:58,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:55:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534527718] [2024-06-21 15:55:58,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:55:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:55:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:55:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:55:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:55:58,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:55:58,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 421 transitions, 4630 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:55:58,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:55:58,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:55:58,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:00,469 INFO L124 PetriNetUnfolderBase]: 4023/6765 cut-off events. [2024-06-21 15:56:00,469 INFO L125 PetriNetUnfolderBase]: For 1847308/1847312 co-relation queries the response was YES. [2024-06-21 15:56:00,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60420 conditions, 6765 events. 4023/6765 cut-off events. For 1847308/1847312 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 48017 event pairs, 1378 based on Foata normal form. 28/6792 useless extension candidates. Maximal degree in co-relation 60235. Up to 5398 conditions per place. [2024-06-21 15:56:00,565 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 142 changer transitions 21/466 dead transitions. [2024-06-21 15:56:00,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 466 transitions, 6072 flow [2024-06-21 15:56:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:56:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:56:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-21 15:56:00,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-06-21 15:56:00,566 INFO L175 Difference]: Start difference. First operand has 434 places, 421 transitions, 4630 flow. Second operand 12 states and 275 transitions. [2024-06-21 15:56:00,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 466 transitions, 6072 flow [2024-06-21 15:56:04,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 466 transitions, 5875 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-21 15:56:04,549 INFO L231 Difference]: Finished difference. Result has 425 places, 415 transitions, 4632 flow [2024-06-21 15:56:04,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4632, PETRI_PLACES=425, PETRI_TRANSITIONS=415} [2024-06-21 15:56:04,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 15:56:04,550 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 415 transitions, 4632 flow [2024-06-21 15:56:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:04,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:04,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:04,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 15:56:04,550 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:04,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1021277134, now seen corresponding path program 1 times [2024-06-21 15:56:04,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:04,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83725271] [2024-06-21 15:56:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:04,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:04,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:04,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83725271] [2024-06-21 15:56:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83725271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:04,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534505461] [2024-06-21 15:56:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:04,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:04,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:04,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:04,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 415 transitions, 4632 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:04,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:04,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:04,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:06,278 INFO L124 PetriNetUnfolderBase]: 4239/7172 cut-off events. [2024-06-21 15:56:06,278 INFO L125 PetriNetUnfolderBase]: For 2403142/2403152 co-relation queries the response was YES. [2024-06-21 15:56:06,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71073 conditions, 7172 events. 4239/7172 cut-off events. For 2403142/2403152 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 51849 event pairs, 1621 based on Foata normal form. 34/7204 useless extension candidates. Maximal degree in co-relation 70892. Up to 5397 conditions per place. [2024-06-21 15:56:06,379 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 291 selfloop transitions, 134 changer transitions 19/451 dead transitions. [2024-06-21 15:56:06,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 451 transitions, 6022 flow [2024-06-21 15:56:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:56:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:56:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-21 15:56:06,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 15:56:06,379 INFO L175 Difference]: Start difference. First operand has 425 places, 415 transitions, 4632 flow. Second operand 9 states and 213 transitions. [2024-06-21 15:56:06,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 451 transitions, 6022 flow [2024-06-21 15:56:13,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 451 transitions, 5762 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 15:56:13,428 INFO L231 Difference]: Finished difference. Result has 420 places, 411 transitions, 4591 flow [2024-06-21 15:56:13,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4591, PETRI_PLACES=420, PETRI_TRANSITIONS=411} [2024-06-21 15:56:13,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 15:56:13,428 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 411 transitions, 4591 flow [2024-06-21 15:56:13,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:13,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:13,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:13,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-21 15:56:13,428 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:13,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1109842894, now seen corresponding path program 2 times [2024-06-21 15:56:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901272101] [2024-06-21 15:56:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:13,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:13,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901272101] [2024-06-21 15:56:13,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901272101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:13,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:13,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665907533] [2024-06-21 15:56:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:13,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:13,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 411 transitions, 4591 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:13,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:13,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:13,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:15,141 INFO L124 PetriNetUnfolderBase]: 4270/7213 cut-off events. [2024-06-21 15:56:15,141 INFO L125 PetriNetUnfolderBase]: For 2573848/2573853 co-relation queries the response was YES. [2024-06-21 15:56:15,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74482 conditions, 7213 events. 4270/7213 cut-off events. For 2573848/2573853 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52205 event pairs, 1678 based on Foata normal form. 29/7240 useless extension candidates. Maximal degree in co-relation 74302. Up to 6119 conditions per place. [2024-06-21 15:56:15,250 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 290 selfloop transitions, 133 changer transitions 10/440 dead transitions. [2024-06-21 15:56:15,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 440 transitions, 5901 flow [2024-06-21 15:56:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:56:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:56:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 15:56:15,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 15:56:15,250 INFO L175 Difference]: Start difference. First operand has 420 places, 411 transitions, 4591 flow. Second operand 9 states and 208 transitions. [2024-06-21 15:56:15,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 440 transitions, 5901 flow [2024-06-21 15:56:22,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 440 transitions, 5649 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 15:56:22,564 INFO L231 Difference]: Finished difference. Result has 418 places, 408 transitions, 4579 flow [2024-06-21 15:56:22,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4579, PETRI_PLACES=418, PETRI_TRANSITIONS=408} [2024-06-21 15:56:22,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 15:56:22,565 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 408 transitions, 4579 flow [2024-06-21 15:56:22,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:22,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:22,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:22,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-21 15:56:22,565 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:22,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1946863392, now seen corresponding path program 3 times [2024-06-21 15:56:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:22,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482397787] [2024-06-21 15:56:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:22,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482397787] [2024-06-21 15:56:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482397787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:22,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:22,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:22,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735479719] [2024-06-21 15:56:22,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:22,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:22,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:22,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:22,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:22,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:22,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 408 transitions, 4579 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:22,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:22,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:24,336 INFO L124 PetriNetUnfolderBase]: 4246/7178 cut-off events. [2024-06-21 15:56:24,336 INFO L125 PetriNetUnfolderBase]: For 2552369/2552378 co-relation queries the response was YES. [2024-06-21 15:56:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74064 conditions, 7178 events. 4246/7178 cut-off events. For 2552369/2552378 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51953 event pairs, 1705 based on Foata normal form. 35/7212 useless extension candidates. Maximal degree in co-relation 73885. Up to 6324 conditions per place. [2024-06-21 15:56:24,441 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 283 selfloop transitions, 137 changer transitions 12/439 dead transitions. [2024-06-21 15:56:24,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 439 transitions, 5577 flow [2024-06-21 15:56:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:56:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:56:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-21 15:56:24,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 15:56:24,442 INFO L175 Difference]: Start difference. First operand has 418 places, 408 transitions, 4579 flow. Second operand 12 states and 264 transitions. [2024-06-21 15:56:24,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 439 transitions, 5577 flow [2024-06-21 15:56:31,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 439 transitions, 5310 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:56:31,241 INFO L231 Difference]: Finished difference. Result has 420 places, 404 transitions, 4560 flow [2024-06-21 15:56:31,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4560, PETRI_PLACES=420, PETRI_TRANSITIONS=404} [2024-06-21 15:56:31,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 15:56:31,241 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 404 transitions, 4560 flow [2024-06-21 15:56:31,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:31,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:31,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:31,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-21 15:56:31,241 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:31,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1946715522, now seen corresponding path program 4 times [2024-06-21 15:56:31,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:31,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788957326] [2024-06-21 15:56:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:31,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788957326] [2024-06-21 15:56:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788957326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:31,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:31,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:31,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346940924] [2024-06-21 15:56:31,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:31,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:31,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:31,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:31,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:31,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 404 transitions, 4560 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:31,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:31,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:33,072 INFO L124 PetriNetUnfolderBase]: 4231/7159 cut-off events. [2024-06-21 15:56:33,072 INFO L125 PetriNetUnfolderBase]: For 2494493/2494497 co-relation queries the response was YES. [2024-06-21 15:56:33,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73645 conditions, 7159 events. 4231/7159 cut-off events. For 2494493/2494497 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 51878 event pairs, 1659 based on Foata normal form. 28/7186 useless extension candidates. Maximal degree in co-relation 73467. Up to 6276 conditions per place. [2024-06-21 15:56:33,182 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 278 selfloop transitions, 131 changer transitions 23/439 dead transitions. [2024-06-21 15:56:33,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 439 transitions, 5606 flow [2024-06-21 15:56:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:56:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:56:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-21 15:56:33,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-21 15:56:33,183 INFO L175 Difference]: Start difference. First operand has 420 places, 404 transitions, 4560 flow. Second operand 12 states and 265 transitions. [2024-06-21 15:56:33,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 439 transitions, 5606 flow [2024-06-21 15:56:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 439 transitions, 5328 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 15:56:40,097 INFO L231 Difference]: Finished difference. Result has 418 places, 397 transitions, 4467 flow [2024-06-21 15:56:40,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4467, PETRI_PLACES=418, PETRI_TRANSITIONS=397} [2024-06-21 15:56:40,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 15:56:40,097 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 397 transitions, 4467 flow [2024-06-21 15:56:40,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-21 15:56:40,098 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:40,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1023154804, now seen corresponding path program 5 times [2024-06-21 15:56:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:40,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624400843] [2024-06-21 15:56:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:40,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:40,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624400843] [2024-06-21 15:56:40,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624400843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:40,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:40,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297433793] [2024-06-21 15:56:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:40,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:40,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:40,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 397 transitions, 4467 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:40,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:40,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:40,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:41,723 INFO L124 PetriNetUnfolderBase]: 4069/6868 cut-off events. [2024-06-21 15:56:41,724 INFO L125 PetriNetUnfolderBase]: For 2271856/2271861 co-relation queries the response was YES. [2024-06-21 15:56:41,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68595 conditions, 6868 events. 4069/6868 cut-off events. For 2271856/2271861 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 49360 event pairs, 1631 based on Foata normal form. 31/6897 useless extension candidates. Maximal degree in co-relation 68418. Up to 6065 conditions per place. [2024-06-21 15:56:41,819 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 273 selfloop transitions, 121 changer transitions 18/419 dead transitions. [2024-06-21 15:56:41,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 419 transitions, 5403 flow [2024-06-21 15:56:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:56:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:56:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 15:56:41,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 15:56:41,820 INFO L175 Difference]: Start difference. First operand has 418 places, 397 transitions, 4467 flow. Second operand 9 states and 200 transitions. [2024-06-21 15:56:41,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 419 transitions, 5403 flow [2024-06-21 15:56:47,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 419 transitions, 5127 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 15:56:47,292 INFO L231 Difference]: Finished difference. Result has 410 places, 391 transitions, 4381 flow [2024-06-21 15:56:47,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4381, PETRI_PLACES=410, PETRI_TRANSITIONS=391} [2024-06-21 15:56:47,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 15:56:47,292 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 391 transitions, 4381 flow [2024-06-21 15:56:47,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:47,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:47,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-21 15:56:47,292 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:47,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 389049738, now seen corresponding path program 6 times [2024-06-21 15:56:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:47,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611018056] [2024-06-21 15:56:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:47,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611018056] [2024-06-21 15:56:47,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611018056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:47,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:47,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:47,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175025689] [2024-06-21 15:56:47,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:47,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:47,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:47,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:47,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 391 transitions, 4381 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:47,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:47,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:47,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:48,789 INFO L124 PetriNetUnfolderBase]: 4057/6849 cut-off events. [2024-06-21 15:56:48,790 INFO L125 PetriNetUnfolderBase]: For 2202078/2202082 co-relation queries the response was YES. [2024-06-21 15:56:48,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67911 conditions, 6849 events. 4057/6849 cut-off events. For 2202078/2202082 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 49200 event pairs, 1622 based on Foata normal form. 30/6878 useless extension candidates. Maximal degree in co-relation 67736. Up to 6168 conditions per place. [2024-06-21 15:56:48,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 341 selfloop transitions, 50 changer transitions 12/410 dead transitions. [2024-06-21 15:56:48,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 410 transitions, 5291 flow [2024-06-21 15:56:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:56:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:56:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 15:56:48,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-21 15:56:48,888 INFO L175 Difference]: Start difference. First operand has 410 places, 391 transitions, 4381 flow. Second operand 9 states and 196 transitions. [2024-06-21 15:56:48,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 410 transitions, 5291 flow [2024-06-21 15:56:55,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 410 transitions, 5039 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 15:56:55,734 INFO L231 Difference]: Finished difference. Result has 404 places, 387 transitions, 4186 flow [2024-06-21 15:56:55,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4186, PETRI_PLACES=404, PETRI_TRANSITIONS=387} [2024-06-21 15:56:55,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-21 15:56:55,734 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 387 transitions, 4186 flow [2024-06-21 15:56:55,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:55,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:56:55,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-21 15:56:55,735 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:56:55,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash -498018080, now seen corresponding path program 7 times [2024-06-21 15:56:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:55,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570318185] [2024-06-21 15:56:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:55,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:55,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570318185] [2024-06-21 15:56:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570318185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:55,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:55,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:56:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110392045] [2024-06-21 15:56:55,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:55,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:56:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:56:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:56:55,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:56:55,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 387 transitions, 4186 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:55,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:56:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:56:57,428 INFO L124 PetriNetUnfolderBase]: 4257/7219 cut-off events. [2024-06-21 15:56:57,428 INFO L125 PetriNetUnfolderBase]: For 2252403/2252407 co-relation queries the response was YES. [2024-06-21 15:56:57,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71708 conditions, 7219 events. 4257/7219 cut-off events. For 2252403/2252407 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52357 event pairs, 1437 based on Foata normal form. 22/7240 useless extension candidates. Maximal degree in co-relation 71535. Up to 4352 conditions per place. [2024-06-21 15:56:57,528 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 270 selfloop transitions, 145 changer transitions 17/439 dead transitions. [2024-06-21 15:56:57,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 439 transitions, 5877 flow [2024-06-21 15:56:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:56:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:56:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-21 15:56:57,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-06-21 15:56:57,529 INFO L175 Difference]: Start difference. First operand has 404 places, 387 transitions, 4186 flow. Second operand 12 states and 275 transitions. [2024-06-21 15:56:57,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 439 transitions, 5877 flow [2024-06-21 15:57:04,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 439 transitions, 5765 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 15:57:04,124 INFO L231 Difference]: Finished difference. Result has 408 places, 385 transitions, 4366 flow [2024-06-21 15:57:04,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4366, PETRI_PLACES=408, PETRI_TRANSITIONS=385} [2024-06-21 15:57:04,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-21 15:57:04,124 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 385 transitions, 4366 flow [2024-06-21 15:57:04,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:04,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:04,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-21 15:57:04,124 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:04,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash -488763650, now seen corresponding path program 8 times [2024-06-21 15:57:04,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:04,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171714446] [2024-06-21 15:57:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:04,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:04,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171714446] [2024-06-21 15:57:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171714446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:04,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:57:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111977837] [2024-06-21 15:57:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:04,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:57:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:57:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:57:04,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:57:04,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 385 transitions, 4366 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:04,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:57:04,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:05,751 INFO L124 PetriNetUnfolderBase]: 4257/7225 cut-off events. [2024-06-21 15:57:05,751 INFO L125 PetriNetUnfolderBase]: For 2381697/2381701 co-relation queries the response was YES. [2024-06-21 15:57:05,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74381 conditions, 7225 events. 4257/7225 cut-off events. For 2381697/2381701 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 52481 event pairs, 1509 based on Foata normal form. 22/7246 useless extension candidates. Maximal degree in co-relation 74206. Up to 4352 conditions per place. [2024-06-21 15:57:05,855 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 137 changer transitions 8/431 dead transitions. [2024-06-21 15:57:05,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 431 transitions, 5994 flow [2024-06-21 15:57:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:57:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:57:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-21 15:57:05,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-21 15:57:05,856 INFO L175 Difference]: Start difference. First operand has 408 places, 385 transitions, 4366 flow. Second operand 12 states and 272 transitions. [2024-06-21 15:57:05,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 431 transitions, 5994 flow [2024-06-21 15:57:12,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 431 transitions, 5694 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 15:57:12,138 INFO L231 Difference]: Finished difference. Result has 408 places, 384 transitions, 4342 flow [2024-06-21 15:57:12,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4342, PETRI_PLACES=408, PETRI_TRANSITIONS=384} [2024-06-21 15:57:12,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-21 15:57:12,138 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 384 transitions, 4342 flow [2024-06-21 15:57:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:12,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:12,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-21 15:57:12,139 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:12,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash -488752490, now seen corresponding path program 9 times [2024-06-21 15:57:12,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410141939] [2024-06-21 15:57:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410141939] [2024-06-21 15:57:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410141939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:12,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:57:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309378176] [2024-06-21 15:57:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:57:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:57:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:57:12,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:57:12,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 384 transitions, 4342 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:12,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:57:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:13,725 INFO L124 PetriNetUnfolderBase]: 4152/7046 cut-off events. [2024-06-21 15:57:13,725 INFO L125 PetriNetUnfolderBase]: For 2250169/2250173 co-relation queries the response was YES. [2024-06-21 15:57:13,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71364 conditions, 7046 events. 4152/7046 cut-off events. For 2250169/2250173 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 50994 event pairs, 1507 based on Foata normal form. 22/7067 useless extension candidates. Maximal degree in co-relation 71190. Up to 4352 conditions per place. [2024-06-21 15:57:13,988 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 133 changer transitions 12/424 dead transitions. [2024-06-21 15:57:13,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 424 transitions, 5650 flow [2024-06-21 15:57:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 15:57:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 15:57:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-21 15:57:13,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 15:57:13,989 INFO L175 Difference]: Start difference. First operand has 408 places, 384 transitions, 4342 flow. Second operand 12 states and 267 transitions. [2024-06-21 15:57:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 424 transitions, 5650 flow [2024-06-21 15:57:19,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 424 transitions, 5370 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 15:57:19,454 INFO L231 Difference]: Finished difference. Result has 408 places, 378 transitions, 4255 flow [2024-06-21 15:57:19,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4255, PETRI_PLACES=408, PETRI_TRANSITIONS=378} [2024-06-21 15:57:19,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-21 15:57:19,454 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 378 transitions, 4255 flow [2024-06-21 15:57:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:19,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:19,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2024-06-21 15:57:19,455 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:19,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 248610356, now seen corresponding path program 10 times [2024-06-21 15:57:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485036388] [2024-06-21 15:57:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:19,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:19,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:19,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485036388] [2024-06-21 15:57:19,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485036388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:19,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:19,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:57:19,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909123041] [2024-06-21 15:57:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:19,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:57:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:19,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:57:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:57:19,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:57:19,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 378 transitions, 4255 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:19,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:57:19,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:21,151 INFO L124 PetriNetUnfolderBase]: 4010/6790 cut-off events. [2024-06-21 15:57:21,152 INFO L125 PetriNetUnfolderBase]: For 2115829/2115833 co-relation queries the response was YES. [2024-06-21 15:57:21,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67188 conditions, 6790 events. 4010/6790 cut-off events. For 2115829/2115833 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 49070 event pairs, 1580 based on Foata normal form. 28/6817 useless extension candidates. Maximal degree in co-relation 67015. Up to 5865 conditions per place. [2024-06-21 15:57:21,247 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 339 selfloop transitions, 47 changer transitions 11/404 dead transitions. [2024-06-21 15:57:21,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 404 transitions, 5471 flow [2024-06-21 15:57:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 15:57:21,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 15:57:21,248 INFO L175 Difference]: Start difference. First operand has 408 places, 378 transitions, 4255 flow. Second operand 9 states and 200 transitions. [2024-06-21 15:57:21,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 404 transitions, 5471 flow [2024-06-21 15:57:26,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 404 transitions, 5174 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-06-21 15:57:26,238 INFO L231 Difference]: Finished difference. Result has 400 places, 374 transitions, 3995 flow [2024-06-21 15:57:26,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3995, PETRI_PLACES=400, PETRI_TRANSITIONS=374} [2024-06-21 15:57:26,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 15:57:26,238 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 374 transitions, 3995 flow [2024-06-21 15:57:26,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:26,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:26,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2024-06-21 15:57:26,238 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:26,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash 394412118, now seen corresponding path program 11 times [2024-06-21 15:57:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472601102] [2024-06-21 15:57:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:26,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472601102] [2024-06-21 15:57:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472601102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:26,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:57:26,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230268029] [2024-06-21 15:57:26,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:26,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:57:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:57:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:57:26,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:57:26,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 374 transitions, 3995 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:26,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:26,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:57:26,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:27,777 INFO L124 PetriNetUnfolderBase]: 3858/6528 cut-off events. [2024-06-21 15:57:27,777 INFO L125 PetriNetUnfolderBase]: For 1941194/1941198 co-relation queries the response was YES. [2024-06-21 15:57:27,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62245 conditions, 6528 events. 3858/6528 cut-off events. For 1941194/1941198 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 46677 event pairs, 1535 based on Foata normal form. 30/6557 useless extension candidates. Maximal degree in co-relation 62074. Up to 5865 conditions per place. [2024-06-21 15:57:27,867 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 44 changer transitions 12/393 dead transitions. [2024-06-21 15:57:27,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 393 transitions, 4871 flow [2024-06-21 15:57:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 15:57:27,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2024-06-21 15:57:27,868 INFO L175 Difference]: Start difference. First operand has 400 places, 374 transitions, 3995 flow. Second operand 9 states and 193 transitions. [2024-06-21 15:57:27,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 393 transitions, 4871 flow [2024-06-21 15:57:33,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 393 transitions, 4764 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 15:57:33,160 INFO L231 Difference]: Finished difference. Result has 397 places, 370 transitions, 3932 flow [2024-06-21 15:57:33,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3932, PETRI_PLACES=397, PETRI_TRANSITIONS=370} [2024-06-21 15:57:33,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-21 15:57:33,160 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 370 transitions, 3932 flow [2024-06-21 15:57:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:33,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:33,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:33,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2024-06-21 15:57:33,161 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:33,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2044531266, now seen corresponding path program 12 times [2024-06-21 15:57:33,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:33,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545392083] [2024-06-21 15:57:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:33,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:33,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545392083] [2024-06-21 15:57:33,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545392083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:33,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:33,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 15:57:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350937429] [2024-06-21 15:57:33,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:33,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 15:57:33,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 15:57:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 15:57:33,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 15:57:33,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 370 transitions, 3932 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:33,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:33,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 15:57:33,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15