./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_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.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_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-76401ed-m [2024-06-20 15:14:00,779 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:14:00,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:14:00,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:14:00,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:14:00,883 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:14:00,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:14:00,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:14:00,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:14:00,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:14:00,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:14:00,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:14:00,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:14:00,892 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:14:00,892 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:14:00,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:14:00,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:14:00,893 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:14:00,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:14:00,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:14:00,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:14:00,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:14:00,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:14:00,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:14:00,894 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:14:00,894 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:14:00,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:14:00,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:14:00,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:14:00,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:14:00,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:14:00,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:14:00,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:14:00,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:14:00,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:14:00,897 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:14:00,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:14:00,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:14:00,898 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:14:00,898 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:14:00,898 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:14:00,898 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:14:00,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:14:00,898 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:14:01,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:14:01,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:14:01,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:14:01,141 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:14:01,142 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:14:01,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:14:02,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:14:02,417 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:14:02,418 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:14:02,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b09d55f9/b8ad2e9e68084686913dcbab4ffeb2f7/FLAG65ae8183e [2024-06-20 15:14:02,445 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b09d55f9/b8ad2e9e68084686913dcbab4ffeb2f7 [2024-06-20 15:14:02,447 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:14:02,448 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:14:02,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 15:14:02,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:14:02,551 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:14:02,552 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:14:02,552 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:14:02,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:14:02,556 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:14:02" (1/2) ... [2024-06-20 15:14:02,557 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c88f34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:14:02, skipping insertion in model container [2024-06-20 15:14:02,557 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:14:02" (1/2) ... [2024-06-20 15:14:02,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4470588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:14:02, skipping insertion in model container [2024-06-20 15:14:02,559 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:14:02" (2/2) ... [2024-06-20 15:14:02,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c88f34d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:02, skipping insertion in model container [2024-06-20 15:14:02,560 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:14:02" (2/2) ... [2024-06-20 15:14:02,560 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:14:02,595 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:14:02,597 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:14:02,597 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:14:02,597 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:14:02,597 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:14:02,597 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-20 15:14:02,631 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:14:02,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:14:02,937 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:14:03,046 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:14:03,082 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:14:03,082 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03 WrapperNode [2024-06-20 15:14:03,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:14:03,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:14:03,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:14:03,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:14:03,090 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 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,106 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 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,189 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-20 15:14:03,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:14:03,191 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:14:03,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:14:03,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:14:03,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,208 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,223 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:14:03,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,229 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:14:03,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:14:03,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:14:03,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:14:03,233 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (1/1) ... [2024-06-20 15:14:03,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:14:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:14:03,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:14:03,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:14:03,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:14:03,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:14:03,286 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:14:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:14:03,286 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:14:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:14:03,286 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:14:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:14:03,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:14:03,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:14:03,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:14:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:14:03,288 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:14:03,380 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:14:03,382 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:14:03,532 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:14:03,533 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:14:03,598 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:14:03,599 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:14:03,599 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:14:03 BoogieIcfgContainer [2024-06-20 15:14:03,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:14:03,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:14:03,601 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:14:03,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:14:03,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:14:02" (1/4) ... [2024-06-20 15:14:03,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9d10d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:14:03, skipping insertion in model container [2024-06-20 15:14:03,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:14:02" (2/4) ... [2024-06-20 15:14:03,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9d10d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:14:03, skipping insertion in model container [2024-06-20 15:14:03,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:14:03" (3/4) ... [2024-06-20 15:14:03,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9d10d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:14:03, skipping insertion in model container [2024-06-20 15:14:03,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:14:03" (4/4) ... [2024-06-20 15:14:03,606 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:14:03,620 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:14:03,620 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:14:03,620 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:14:03,649 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:14:03,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-20 15:14:03,692 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-20 15:14:03,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:14:03,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:14:03,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-20 15:14:03,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-20 15:14:03,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:14:03,717 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;@40c7ed9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:14:03,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:14:03,723 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:14:03,723 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:14:03,723 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:14:03,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:14:03,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:03,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash 215575840, now seen corresponding path program 1 times [2024-06-20 15:14:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392817536] [2024-06-20 15:14:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392817536] [2024-06-20 15:14:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392817536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:14:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519614013] [2024-06-20 15:14:04,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:14:04,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:14:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:14:04,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 39 [2024-06-20 15:14:04,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 39 [2024-06-20 15:14:04,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,329 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-20 15:14:04,330 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 15:14:04,335 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 55. Compared 3895 event pairs, 288 based on Foata normal form. 1/787 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-20 15:14:04,341 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-06-20 15:14:04,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 157 flow [2024-06-20 15:14:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:14:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:14:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-20 15:14:04,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-20 15:14:04,352 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 82 transitions. [2024-06-20 15:14:04,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 157 flow [2024-06-20 15:14:04,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:04,357 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-20 15:14:04,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-20 15:14:04,362 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-20 15:14:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-20 15:14:04,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:14:04,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:04,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1277271903, now seen corresponding path program 1 times [2024-06-20 15:14:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240436738] [2024-06-20 15:14:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240436738] [2024-06-20 15:14:04,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240436738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:14:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068445166] [2024-06-20 15:14:04,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:14:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:14:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:14:04,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:04,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:04,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,805 INFO L124 PetriNetUnfolderBase]: 754/1254 cut-off events. [2024-06-20 15:14:04,805 INFO L125 PetriNetUnfolderBase]: For 194/196 co-relation queries the response was YES. [2024-06-20 15:14:04,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 1254 events. 754/1254 cut-off events. For 194/196 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6109 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-20 15:14:04,811 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 15:14:04,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 248 flow [2024-06-20 15:14:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:14:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:14:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 15:14:04,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-20 15:14:04,816 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 103 transitions. [2024-06-20 15:14:04,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 248 flow [2024-06-20 15:14:04,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:04,818 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 148 flow [2024-06-20 15:14:04,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-20 15:14:04,818 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-20 15:14:04,819 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 148 flow [2024-06-20 15:14:04,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:14:04,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:04,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,823 INFO L85 PathProgramCache]: Analyzing trace with hash -902335586, now seen corresponding path program 1 times [2024-06-20 15:14:04,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137028023] [2024-06-20 15:14:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137028023] [2024-06-20 15:14:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137028023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205075411] [2024-06-20 15:14:04,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:05,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:05,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:05,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,193 INFO L124 PetriNetUnfolderBase]: 745/1239 cut-off events. [2024-06-20 15:14:05,193 INFO L125 PetriNetUnfolderBase]: For 580/588 co-relation queries the response was YES. [2024-06-20 15:14:05,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 1239 events. 745/1239 cut-off events. For 580/588 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6017 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-20 15:14:05,201 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 44 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-20 15:14:05,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 308 flow [2024-06-20 15:14:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:14:05,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-20 15:14:05,205 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 148 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:14:05,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 308 flow [2024-06-20 15:14:05,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 306 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:14:05,209 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 179 flow [2024-06-20 15:14:05,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-20 15:14:05,210 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-06-20 15:14:05,210 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 179 flow [2024-06-20 15:14:05,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:14:05,211 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)] === [2024-06-20 15:14:05,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1632488695, now seen corresponding path program 1 times [2024-06-20 15:14:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033476772] [2024-06-20 15:14:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033476772] [2024-06-20 15:14:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033476772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:14:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393879507] [2024-06-20 15:14:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:14:05,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:14:05,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:14:05,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:05,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:05,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,538 INFO L124 PetriNetUnfolderBase]: 747/1228 cut-off events. [2024-06-20 15:14:05,539 INFO L125 PetriNetUnfolderBase]: For 1101/1103 co-relation queries the response was YES. [2024-06-20 15:14:05,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1228 events. 747/1228 cut-off events. For 1101/1103 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5857 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-20 15:14:05,545 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-20 15:14:05,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 387 flow [2024-06-20 15:14:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:14:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:14:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:14:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-20 15:14:05,547 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 179 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:14:05,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 387 flow [2024-06-20 15:14:05,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 362 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:05,550 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-20 15:14:05,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-20 15:14:05,551 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-06-20 15:14:05,551 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-20 15:14:05,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:14:05,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:05,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2101841614, now seen corresponding path program 1 times [2024-06-20 15:14:05,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748112660] [2024-06-20 15:14:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748112660] [2024-06-20 15:14:05,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748112660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:05,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404411930] [2024-06-20 15:14:05,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:05,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:05,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:05,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:05,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,823 INFO L124 PetriNetUnfolderBase]: 758/1285 cut-off events. [2024-06-20 15:14:05,824 INFO L125 PetriNetUnfolderBase]: For 1862/1874 co-relation queries the response was YES. [2024-06-20 15:14:05,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 1285 events. 758/1285 cut-off events. For 1862/1874 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6408 event pairs, 280 based on Foata normal form. 14/1298 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-20 15:14:05,831 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-20 15:14:05,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 484 flow [2024-06-20 15:14:05,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 15:14:05,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-20 15:14:05,833 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 5 states and 126 transitions. [2024-06-20 15:14:05,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 484 flow [2024-06-20 15:14:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 478 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-20 15:14:05,837 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 315 flow [2024-06-20 15:14:05,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-20 15:14:05,837 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-06-20 15:14:05,838 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 315 flow [2024-06-20 15:14:05,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:14:05,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:05,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1897587144, now seen corresponding path program 1 times [2024-06-20 15:14:05,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6130125] [2024-06-20 15:14:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6130125] [2024-06-20 15:14:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6130125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144167446] [2024-06-20 15:14:05,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:05,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:05,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:05,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:05,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,132 INFO L124 PetriNetUnfolderBase]: 800/1331 cut-off events. [2024-06-20 15:14:06,132 INFO L125 PetriNetUnfolderBase]: For 2808/2820 co-relation queries the response was YES. [2024-06-20 15:14:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1331 events. 800/1331 cut-off events. For 2808/2820 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6563 event pairs, 253 based on Foata normal form. 15/1345 useless extension candidates. Maximal degree in co-relation 4535. Up to 1123 conditions per place. [2024-06-20 15:14:06,141 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 48 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2024-06-20 15:14:06,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 554 flow [2024-06-20 15:14:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:14:06,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-20 15:14:06,143 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 315 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:14:06,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 554 flow [2024-06-20 15:14:06,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 531 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:06,149 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 427 flow [2024-06-20 15:14:06,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-20 15:14:06,150 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-06-20 15:14:06,150 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 427 flow [2024-06-20 15:14:06,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:14:06,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:06,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1897586958, now seen corresponding path program 2 times [2024-06-20 15:14:06,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381018783] [2024-06-20 15:14:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381018783] [2024-06-20 15:14:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381018783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:06,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205617251] [2024-06-20 15:14:06,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:06,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:06,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:06,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:06,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,409 INFO L124 PetriNetUnfolderBase]: 795/1342 cut-off events. [2024-06-20 15:14:06,409 INFO L125 PetriNetUnfolderBase]: For 4227/4241 co-relation queries the response was YES. [2024-06-20 15:14:06,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 1342 events. 795/1342 cut-off events. For 4227/4241 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6707 event pairs, 271 based on Foata normal form. 16/1357 useless extension candidates. Maximal degree in co-relation 5126. Up to 1148 conditions per place. [2024-06-20 15:14:06,417 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 58 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-20 15:14:06,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 605 flow [2024-06-20 15:14:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:14:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:14:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-20 15:14:06,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-20 15:14:06,419 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 427 flow. Second operand 4 states and 103 transitions. [2024-06-20 15:14:06,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 605 flow [2024-06-20 15:14:06,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 578 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:06,426 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 438 flow [2024-06-20 15:14:06,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2024-06-20 15:14:06,427 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-20 15:14:06,427 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 438 flow [2024-06-20 15:14:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:14:06,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:06,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -687550554, now seen corresponding path program 2 times [2024-06-20 15:14:06,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28116472] [2024-06-20 15:14:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28116472] [2024-06-20 15:14:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28116472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200697478] [2024-06-20 15:14:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:06,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:06,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:06,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:06,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,685 INFO L124 PetriNetUnfolderBase]: 805/1335 cut-off events. [2024-06-20 15:14:06,685 INFO L125 PetriNetUnfolderBase]: For 4916/4930 co-relation queries the response was YES. [2024-06-20 15:14:06,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1335 events. 805/1335 cut-off events. For 4916/4930 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6573 event pairs, 267 based on Foata normal form. 17/1345 useless extension candidates. Maximal degree in co-relation 5313. Up to 1092 conditions per place. [2024-06-20 15:14:06,693 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 55 selfloop transitions, 31 changer transitions 0/93 dead transitions. [2024-06-20 15:14:06,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 764 flow [2024-06-20 15:14:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:14:06,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512820512820513 [2024-06-20 15:14:06,695 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 438 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:14:06,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 764 flow [2024-06-20 15:14:06,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 726 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:06,701 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 582 flow [2024-06-20 15:14:06,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=582, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-20 15:14:06,702 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2024-06-20 15:14:06,702 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 582 flow [2024-06-20 15:14:06,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:14:06,703 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:06,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash -687541626, now seen corresponding path program 1 times [2024-06-20 15:14:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085551197] [2024-06-20 15:14:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085551197] [2024-06-20 15:14:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085551197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540671674] [2024-06-20 15:14:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:06,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:06,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 582 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:06,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,002 INFO L124 PetriNetUnfolderBase]: 835/1398 cut-off events. [2024-06-20 15:14:07,003 INFO L125 PetriNetUnfolderBase]: For 5763/5769 co-relation queries the response was YES. [2024-06-20 15:14:07,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5897 conditions, 1398 events. 835/1398 cut-off events. For 5763/5769 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6980 event pairs, 242 based on Foata normal form. 18/1412 useless extension candidates. Maximal degree in co-relation 5867. Up to 1175 conditions per place. [2024-06-20 15:14:07,013 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 81 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-20 15:14:07,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 892 flow [2024-06-20 15:14:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 15:14:07,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-20 15:14:07,014 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 582 flow. Second operand 5 states and 126 transitions. [2024-06-20 15:14:07,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 892 flow [2024-06-20 15:14:07,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 856 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-20 15:14:07,022 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 606 flow [2024-06-20 15:14:07,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=606, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-20 15:14:07,023 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-20 15:14:07,023 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 606 flow [2024-06-20 15:14:07,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:14:07,024 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:07,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1548956050, now seen corresponding path program 1 times [2024-06-20 15:14:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924356823] [2024-06-20 15:14:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924356823] [2024-06-20 15:14:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924356823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:14:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697497835] [2024-06-20 15:14:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:14:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:14:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:14:07,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:07,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 606 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:07,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,257 INFO L124 PetriNetUnfolderBase]: 760/1286 cut-off events. [2024-06-20 15:14:07,257 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-20 15:14:07,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 1286 events. 760/1286 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6460 event pairs, 246 based on Foata normal form. 6/1273 useless extension candidates. Maximal degree in co-relation 5373. Up to 1115 conditions per place. [2024-06-20 15:14:07,270 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 64 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2024-06-20 15:14:07,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 797 flow [2024-06-20 15:14:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:14:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:14:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-20 15:14:07,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-20 15:14:07,272 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 606 flow. Second operand 4 states and 99 transitions. [2024-06-20 15:14:07,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 797 flow [2024-06-20 15:14:07,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 763 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:07,279 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 637 flow [2024-06-20 15:14:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=637, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-06-20 15:14:07,280 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-20 15:14:07,280 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 637 flow [2024-06-20 15:14:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:14:07,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:07,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1616664564, now seen corresponding path program 1 times [2024-06-20 15:14:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294068543] [2024-06-20 15:14:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294068543] [2024-06-20 15:14:07,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294068543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945090152] [2024-06-20 15:14:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:07,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 637 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,600 INFO L124 PetriNetUnfolderBase]: 886/1493 cut-off events. [2024-06-20 15:14:07,600 INFO L125 PetriNetUnfolderBase]: For 6889/6903 co-relation queries the response was YES. [2024-06-20 15:14:07,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6279 conditions, 1493 events. 886/1493 cut-off events. For 6889/6903 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7658 event pairs, 249 based on Foata normal form. 17/1509 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-20 15:14:07,611 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 42 changer transitions 0/129 dead transitions. [2024-06-20 15:14:07,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 1151 flow [2024-06-20 15:14:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:14:07,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210826210826211 [2024-06-20 15:14:07,614 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 637 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:14:07,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 1151 flow [2024-06-20 15:14:07,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1139 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:07,622 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 831 flow [2024-06-20 15:14:07,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=831, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-20 15:14:07,623 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-20 15:14:07,623 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 831 flow [2024-06-20 15:14:07,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:14:07,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:07,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1304345368, now seen corresponding path program 2 times [2024-06-20 15:14:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129441877] [2024-06-20 15:14:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129441877] [2024-06-20 15:14:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129441877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291927787] [2024-06-20 15:14:07,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:07,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 831 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:07,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,973 INFO L124 PetriNetUnfolderBase]: 904/1526 cut-off events. [2024-06-20 15:14:07,973 INFO L125 PetriNetUnfolderBase]: For 9411/9425 co-relation queries the response was YES. [2024-06-20 15:14:07,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7117 conditions, 1526 events. 904/1526 cut-off events. For 9411/9425 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7874 event pairs, 250 based on Foata normal form. 17/1542 useless extension candidates. Maximal degree in co-relation 7078. Up to 1204 conditions per place. [2024-06-20 15:14:07,984 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 82 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2024-06-20 15:14:07,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1264 flow [2024-06-20 15:14:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:14:07,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-20 15:14:07,986 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 831 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:14:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1264 flow [2024-06-20 15:14:07,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1167 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:07,997 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 885 flow [2024-06-20 15:14:07,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=885, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-20 15:14:07,998 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-20 15:14:07,998 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 885 flow [2024-06-20 15:14:07,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:14:07,999 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:07,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1304339788, now seen corresponding path program 3 times [2024-06-20 15:14:07,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073441593] [2024-06-20 15:14:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073441593] [2024-06-20 15:14:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073441593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637198537] [2024-06-20 15:14:08,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 885 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:08,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,341 INFO L124 PetriNetUnfolderBase]: 906/1532 cut-off events. [2024-06-20 15:14:08,341 INFO L125 PetriNetUnfolderBase]: For 10805/10819 co-relation queries the response was YES. [2024-06-20 15:14:08,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7415 conditions, 1532 events. 906/1532 cut-off events. For 10805/10819 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7930 event pairs, 250 based on Foata normal form. 17/1548 useless extension candidates. Maximal degree in co-relation 7373. Up to 1209 conditions per place. [2024-06-20 15:14:08,388 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 81 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-20 15:14:08,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1303 flow [2024-06-20 15:14:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:14:08,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:14:08,390 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 885 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:14:08,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1303 flow [2024-06-20 15:14:08,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1228 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:08,403 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 953 flow [2024-06-20 15:14:08,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=953, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-20 15:14:08,404 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-20 15:14:08,404 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 953 flow [2024-06-20 15:14:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:14:08,405 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:08,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 160770198, now seen corresponding path program 4 times [2024-06-20 15:14:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585677892] [2024-06-20 15:14:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585677892] [2024-06-20 15:14:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585677892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180114638] [2024-06-20 15:14:08,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:08,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 953 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:08,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,728 INFO L124 PetriNetUnfolderBase]: 930/1568 cut-off events. [2024-06-20 15:14:08,728 INFO L125 PetriNetUnfolderBase]: For 12693/12707 co-relation queries the response was YES. [2024-06-20 15:14:08,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7761 conditions, 1568 events. 930/1568 cut-off events. For 12693/12707 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8126 event pairs, 255 based on Foata normal form. 17/1578 useless extension candidates. Maximal degree in co-relation 7718. Up to 1171 conditions per place. [2024-06-20 15:14:08,740 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 80 selfloop transitions, 60 changer transitions 0/147 dead transitions. [2024-06-20 15:14:08,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1535 flow [2024-06-20 15:14:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:14:08,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-20 15:14:08,742 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 953 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:14:08,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1535 flow [2024-06-20 15:14:08,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 147 transitions, 1431 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:08,760 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 1125 flow [2024-06-20 15:14:08,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-06-20 15:14:08,761 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-20 15:14:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 1125 flow [2024-06-20 15:14:08,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:14:08,761 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:08,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1068728269, now seen corresponding path program 1 times [2024-06-20 15:14:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115982309] [2024-06-20 15:14:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115982309] [2024-06-20 15:14:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115982309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821518580] [2024-06-20 15:14:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:08,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:08,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,093 INFO L124 PetriNetUnfolderBase]: 947/1597 cut-off events. [2024-06-20 15:14:09,093 INFO L125 PetriNetUnfolderBase]: For 15676/15690 co-relation queries the response was YES. [2024-06-20 15:14:09,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8493 conditions, 1597 events. 947/1597 cut-off events. For 15676/15690 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8285 event pairs, 164 based on Foata normal form. 18/1614 useless extension candidates. Maximal degree in co-relation 8448. Up to 1278 conditions per place. [2024-06-20 15:14:09,105 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 112 selfloop transitions, 23 changer transitions 0/142 dead transitions. [2024-06-20 15:14:09,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1585 flow [2024-06-20 15:14:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:14:09,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-20 15:14:09,107 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 1125 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:14:09,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1585 flow [2024-06-20 15:14:09,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 142 transitions, 1485 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:09,126 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1158 flow [2024-06-20 15:14:09,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1158, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-20 15:14:09,126 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2024-06-20 15:14:09,127 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1158 flow [2024-06-20 15:14:09,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:14:09,127 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)] === [2024-06-20 15:14:09,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1068788719, now seen corresponding path program 2 times [2024-06-20 15:14:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709636666] [2024-06-20 15:14:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709636666] [2024-06-20 15:14:09,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709636666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246612923] [2024-06-20 15:14:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:09,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:09,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,491 INFO L124 PetriNetUnfolderBase]: 964/1624 cut-off events. [2024-06-20 15:14:09,492 INFO L125 PetriNetUnfolderBase]: For 17583/17597 co-relation queries the response was YES. [2024-06-20 15:14:09,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1624 events. 964/1624 cut-off events. For 17583/17597 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8458 event pairs, 235 based on Foata normal form. 18/1641 useless extension candidates. Maximal degree in co-relation 8784. Up to 1369 conditions per place. [2024-06-20 15:14:09,506 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-06-20 15:14:09,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 1526 flow [2024-06-20 15:14:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:14:09,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-06-20 15:14:09,508 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1158 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:14:09,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 1526 flow [2024-06-20 15:14:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1449 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:09,532 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 1174 flow [2024-06-20 15:14:09,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-20 15:14:09,533 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2024-06-20 15:14:09,533 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 1174 flow [2024-06-20 15:14:09,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:14:09,534 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:09,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1780004595, now seen corresponding path program 3 times [2024-06-20 15:14:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676024564] [2024-06-20 15:14:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676024564] [2024-06-20 15:14:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676024564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:09,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978531819] [2024-06-20 15:14:09,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:09,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:09,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:09,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 1174 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:09,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,863 INFO L124 PetriNetUnfolderBase]: 956/1612 cut-off events. [2024-06-20 15:14:09,864 INFO L125 PetriNetUnfolderBase]: For 18285/18299 co-relation queries the response was YES. [2024-06-20 15:14:09,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 1612 events. 956/1612 cut-off events. For 18285/18299 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8363 event pairs, 162 based on Foata normal form. 18/1629 useless extension candidates. Maximal degree in co-relation 8645. Up to 1336 conditions per place. [2024-06-20 15:14:09,876 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-06-20 15:14:09,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 137 transitions, 1482 flow [2024-06-20 15:14:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 15:14:09,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-20 15:14:09,878 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 1174 flow. Second operand 5 states and 125 transitions. [2024-06-20 15:14:09,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 137 transitions, 1482 flow [2024-06-20 15:14:09,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 137 transitions, 1403 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:09,899 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 1143 flow [2024-06-20 15:14:09,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1143, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2024-06-20 15:14:09,900 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-20 15:14:09,900 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 1143 flow [2024-06-20 15:14:09,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:14:09,901 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:09,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1779819897, now seen corresponding path program 1 times [2024-06-20 15:14:09,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059309012] [2024-06-20 15:14:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:10,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059309012] [2024-06-20 15:14:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059309012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:10,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:10,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940587813] [2024-06-20 15:14:10,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:10,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:10,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:10,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 1143 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:10,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:10,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,225 INFO L124 PetriNetUnfolderBase]: 1011/1699 cut-off events. [2024-06-20 15:14:10,225 INFO L125 PetriNetUnfolderBase]: For 20922/20936 co-relation queries the response was YES. [2024-06-20 15:14:10,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 1699 events. 1011/1699 cut-off events. For 20922/20936 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8899 event pairs, 213 based on Foata normal form. 26/1724 useless extension candidates. Maximal degree in co-relation 9032. Up to 1334 conditions per place. [2024-06-20 15:14:10,240 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 29 changer transitions 0/142 dead transitions. [2024-06-20 15:14:10,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1553 flow [2024-06-20 15:14:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:14:10,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-20 15:14:10,242 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 1143 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:14:10,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1553 flow [2024-06-20 15:14:10,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 1508 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:10,263 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1204 flow [2024-06-20 15:14:10,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1204, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-06-20 15:14:10,263 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 64 predicate places. [2024-06-20 15:14:10,264 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1204 flow [2024-06-20 15:14:10,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:14:10,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:10,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash 455456689, now seen corresponding path program 1 times [2024-06-20 15:14:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376630076] [2024-06-20 15:14:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:10,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376630076] [2024-06-20 15:14:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376630076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:14:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569761696] [2024-06-20 15:14:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:10,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:14:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:14:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:14:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:10,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1204 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:10,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,548 INFO L124 PetriNetUnfolderBase]: 937/1588 cut-off events. [2024-06-20 15:14:10,548 INFO L125 PetriNetUnfolderBase]: For 21123/21130 co-relation queries the response was YES. [2024-06-20 15:14:10,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8815 conditions, 1588 events. 937/1588 cut-off events. For 21123/21130 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8345 event pairs, 214 based on Foata normal form. 8/1578 useless extension candidates. Maximal degree in co-relation 8764. Up to 1337 conditions per place. [2024-06-20 15:14:10,560 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 94 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-20 15:14:10,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 132 transitions, 1472 flow [2024-06-20 15:14:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:14:10,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-20 15:14:10,561 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1204 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:14:10,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 132 transitions, 1472 flow [2024-06-20 15:14:10,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 132 transitions, 1394 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:10,583 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1192 flow [2024-06-20 15:14:10,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1192, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-20 15:14:10,584 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-20 15:14:10,584 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1192 flow [2024-06-20 15:14:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:14:10,585 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)] === [2024-06-20 15:14:10,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash 688916709, now seen corresponding path program 2 times [2024-06-20 15:14:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143690301] [2024-06-20 15:14:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:10,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143690301] [2024-06-20 15:14:10,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143690301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:10,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:10,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:10,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154557958] [2024-06-20 15:14:10,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:10,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:10,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:10,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:10,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:10,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1192 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:10,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:10,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,904 INFO L124 PetriNetUnfolderBase]: 1033/1728 cut-off events. [2024-06-20 15:14:10,904 INFO L125 PetriNetUnfolderBase]: For 24450/24464 co-relation queries the response was YES. [2024-06-20 15:14:10,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 1728 events. 1033/1728 cut-off events. For 24450/24464 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9006 event pairs, 244 based on Foata normal form. 26/1747 useless extension candidates. Maximal degree in co-relation 9385. Up to 1402 conditions per place. [2024-06-20 15:14:10,919 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 108 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-20 15:14:10,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1668 flow [2024-06-20 15:14:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:14:10,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6452991452991453 [2024-06-20 15:14:10,921 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1192 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:14:10,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1668 flow [2024-06-20 15:14:10,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1605 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:10,943 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 1247 flow [2024-06-20 15:14:10,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1247, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2024-06-20 15:14:10,944 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2024-06-20 15:14:10,944 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 1247 flow [2024-06-20 15:14:10,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:14:10,945 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:10,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash 697487589, now seen corresponding path program 3 times [2024-06-20 15:14:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919116543] [2024-06-20 15:14:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919116543] [2024-06-20 15:14:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919116543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:11,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964145783] [2024-06-20 15:14:11,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:11,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:11,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 1247 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:11,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,271 INFO L124 PetriNetUnfolderBase]: 1099/1830 cut-off events. [2024-06-20 15:14:11,272 INFO L125 PetriNetUnfolderBase]: For 26022/26036 co-relation queries the response was YES. [2024-06-20 15:14:11,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10082 conditions, 1830 events. 1099/1830 cut-off events. For 26022/26036 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9612 event pairs, 225 based on Foata normal form. 26/1849 useless extension candidates. Maximal degree in co-relation 10030. Up to 1285 conditions per place. [2024-06-20 15:14:11,287 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-20 15:14:11,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 156 transitions, 1815 flow [2024-06-20 15:14:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:14:11,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2024-06-20 15:14:11,288 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 1247 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:14:11,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 156 transitions, 1815 flow [2024-06-20 15:14:11,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1723 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:11,319 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 1294 flow [2024-06-20 15:14:11,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2024-06-20 15:14:11,320 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 68 predicate places. [2024-06-20 15:14:11,320 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 1294 flow [2024-06-20 15:14:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:14:11,321 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)] === [2024-06-20 15:14:11,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1806019241, now seen corresponding path program 2 times [2024-06-20 15:14:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439214196] [2024-06-20 15:14:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439214196] [2024-06-20 15:14:11,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439214196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:14:11,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495753739] [2024-06-20 15:14:11,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:14:11,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:14:11,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:14:11,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:11,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 1294 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:11,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,589 INFO L124 PetriNetUnfolderBase]: 1047/1750 cut-off events. [2024-06-20 15:14:11,589 INFO L125 PetriNetUnfolderBase]: For 26937/26944 co-relation queries the response was YES. [2024-06-20 15:14:11,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1750 events. 1047/1750 cut-off events. For 26937/26944 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9309 event pairs, 262 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 9879. Up to 1481 conditions per place. [2024-06-20 15:14:11,640 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 90 selfloop transitions, 36 changer transitions 0/139 dead transitions. [2024-06-20 15:14:11,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 139 transitions, 1685 flow [2024-06-20 15:14:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 15:14:11,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-20 15:14:11,641 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 1294 flow. Second operand 5 states and 123 transitions. [2024-06-20 15:14:11,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 139 transitions, 1685 flow [2024-06-20 15:14:11,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 139 transitions, 1610 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:11,666 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1335 flow [2024-06-20 15:14:11,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1335, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-20 15:14:11,667 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 71 predicate places. [2024-06-20 15:14:11,667 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1335 flow [2024-06-20 15:14:11,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:14:11,667 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)] === [2024-06-20 15:14:11,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1314658383, now seen corresponding path program 1 times [2024-06-20 15:14:11,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229130872] [2024-06-20 15:14:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229130872] [2024-06-20 15:14:11,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229130872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:14:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041643782] [2024-06-20 15:14:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:14:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:14:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:14:11,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:11,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1335 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,934 INFO L124 PetriNetUnfolderBase]: 1061/1782 cut-off events. [2024-06-20 15:14:11,935 INFO L125 PetriNetUnfolderBase]: For 28938/28943 co-relation queries the response was YES. [2024-06-20 15:14:11,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10023 conditions, 1782 events. 1061/1782 cut-off events. For 28938/28943 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9525 event pairs, 247 based on Foata normal form. 15/1780 useless extension candidates. Maximal degree in co-relation 9968. Up to 1534 conditions per place. [2024-06-20 15:14:11,951 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 116 selfloop transitions, 14 changer transitions 0/143 dead transitions. [2024-06-20 15:14:11,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 143 transitions, 1663 flow [2024-06-20 15:14:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 15:14:11,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-20 15:14:11,953 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1335 flow. Second operand 5 states and 121 transitions. [2024-06-20 15:14:11,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 143 transitions, 1663 flow [2024-06-20 15:14:11,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 1558 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:11,983 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1290 flow [2024-06-20 15:14:11,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1290, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-20 15:14:11,984 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-20 15:14:11,984 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1290 flow [2024-06-20 15:14:11,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:14:11,984 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:11,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,985 INFO L85 PathProgramCache]: Analyzing trace with hash -452333815, now seen corresponding path program 1 times [2024-06-20 15:14:11,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278249363] [2024-06-20 15:14:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278249363] [2024-06-20 15:14:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278249363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941012980] [2024-06-20 15:14:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:12,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:12,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1290 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) [2024-06-20 15:14:12,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:12,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:12,439 INFO L124 PetriNetUnfolderBase]: 1679/2879 cut-off events. [2024-06-20 15:14:12,439 INFO L125 PetriNetUnfolderBase]: For 57721/57735 co-relation queries the response was YES. [2024-06-20 15:14:12,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2879 events. 1679/2879 cut-off events. For 57721/57735 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17512 event pairs, 441 based on Foata normal form. 50/2928 useless extension candidates. Maximal degree in co-relation 16069. Up to 1290 conditions per place. [2024-06-20 15:14:12,461 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 136 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-20 15:14:12,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 192 transitions, 2144 flow [2024-06-20 15:14:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-20 15:14:12,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:14:12,463 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1290 flow. Second operand 9 states and 234 transitions. [2024-06-20 15:14:12,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 192 transitions, 2144 flow [2024-06-20 15:14:12,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 2106 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:12,508 INFO L231 Difference]: Finished difference. Result has 120 places, 133 transitions, 1448 flow [2024-06-20 15:14:12,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1448, PETRI_PLACES=120, PETRI_TRANSITIONS=133} [2024-06-20 15:14:12,509 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-20 15:14:12,509 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 133 transitions, 1448 flow [2024-06-20 15:14:12,509 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) [2024-06-20 15:14:12,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:14:12,510 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:12,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1140595191, now seen corresponding path program 2 times [2024-06-20 15:14:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070774183] [2024-06-20 15:14:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070774183] [2024-06-20 15:14:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070774183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155132470] [2024-06-20 15:14:12,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:12,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:12,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 133 transitions, 1448 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) [2024-06-20 15:14:12,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:12,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,049 INFO L124 PetriNetUnfolderBase]: 2069/3581 cut-off events. [2024-06-20 15:14:13,049 INFO L125 PetriNetUnfolderBase]: For 80954/80968 co-relation queries the response was YES. [2024-06-20 15:14:13,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3581 events. 2069/3581 cut-off events. For 80954/80968 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23151 event pairs, 738 based on Foata normal form. 50/3630 useless extension candidates. Maximal degree in co-relation 20629. Up to 2374 conditions per place. [2024-06-20 15:14:13,089 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 135 selfloop transitions, 49 changer transitions 0/191 dead transitions. [2024-06-20 15:14:13,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 191 transitions, 2262 flow [2024-06-20 15:14:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-20 15:14:13,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435897435897436 [2024-06-20 15:14:13,091 INFO L175 Difference]: Start difference. First operand has 120 places, 133 transitions, 1448 flow. Second operand 10 states and 251 transitions. [2024-06-20 15:14:13,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 191 transitions, 2262 flow [2024-06-20 15:14:13,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2154 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:13,169 INFO L231 Difference]: Finished difference. Result has 126 places, 135 transitions, 1513 flow [2024-06-20 15:14:13,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1513, PETRI_PLACES=126, PETRI_TRANSITIONS=135} [2024-06-20 15:14:13,169 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-20 15:14:13,170 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 135 transitions, 1513 flow [2024-06-20 15:14:13,170 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) [2024-06-20 15:14:13,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:13,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:13,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:14:13,170 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:13,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1140447321, now seen corresponding path program 3 times [2024-06-20 15:14:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361099705] [2024-06-20 15:14:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361099705] [2024-06-20 15:14:13,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361099705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:13,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757913610] [2024-06-20 15:14:13,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:13,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:13,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:13,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:13,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 135 transitions, 1513 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) [2024-06-20 15:14:13,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:13,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,763 INFO L124 PetriNetUnfolderBase]: 2142/3706 cut-off events. [2024-06-20 15:14:13,764 INFO L125 PetriNetUnfolderBase]: For 86523/86537 co-relation queries the response was YES. [2024-06-20 15:14:13,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3706 events. 2142/3706 cut-off events. For 86523/86537 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24220 event pairs, 829 based on Foata normal form. 56/3753 useless extension candidates. Maximal degree in co-relation 20935. Up to 2945 conditions per place. [2024-06-20 15:14:13,797 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 49 changer transitions 0/180 dead transitions. [2024-06-20 15:14:13,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 2127 flow [2024-06-20 15:14:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-20 15:14:13,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.617948717948718 [2024-06-20 15:14:13,799 INFO L175 Difference]: Start difference. First operand has 126 places, 135 transitions, 1513 flow. Second operand 10 states and 241 transitions. [2024-06-20 15:14:13,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 2127 flow [2024-06-20 15:14:13,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 180 transitions, 2004 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:13,876 INFO L231 Difference]: Finished difference. Result has 129 places, 136 transitions, 1534 flow [2024-06-20 15:14:13,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1534, PETRI_PLACES=129, PETRI_TRANSITIONS=136} [2024-06-20 15:14:13,877 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-20 15:14:13,877 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 136 transitions, 1534 flow [2024-06-20 15:14:13,877 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) [2024-06-20 15:14:13,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:13,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:13,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:14:13,878 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)] === [2024-06-20 15:14:13,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1233958013, now seen corresponding path program 1 times [2024-06-20 15:14:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:13,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156306905] [2024-06-20 15:14:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156306905] [2024-06-20 15:14:13,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156306905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:13,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780687956] [2024-06-20 15:14:13,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:13,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:13,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:13,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 136 transitions, 1534 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:13,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:14,356 INFO L124 PetriNetUnfolderBase]: 2147/3723 cut-off events. [2024-06-20 15:14:14,356 INFO L125 PetriNetUnfolderBase]: For 77161/77169 co-relation queries the response was YES. [2024-06-20 15:14:14,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21118 conditions, 3723 events. 2147/3723 cut-off events. For 77161/77169 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24314 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21058. Up to 3375 conditions per place. [2024-06-20 15:14:14,385 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 139 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-20 15:14:14,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 165 transitions, 2106 flow [2024-06-20 15:14:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 15:14:14,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:14,387 INFO L175 Difference]: Start difference. First operand has 129 places, 136 transitions, 1534 flow. Second operand 7 states and 156 transitions. [2024-06-20 15:14:14,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 165 transitions, 2106 flow [2024-06-20 15:14:14,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 165 transitions, 1964 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:14,460 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1614 flow [2024-06-20 15:14:14,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1614, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-20 15:14:14,461 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-20 15:14:14,461 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1614 flow [2024-06-20 15:14:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:14:14,462 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:14,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1056021391, now seen corresponding path program 4 times [2024-06-20 15:14:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982749979] [2024-06-20 15:14:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982749979] [2024-06-20 15:14:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982749979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620645171] [2024-06-20 15:14:14,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:14,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:14,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:14,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1614 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) [2024-06-20 15:14:14,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:14,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,089 INFO L124 PetriNetUnfolderBase]: 2281/3951 cut-off events. [2024-06-20 15:14:15,089 INFO L125 PetriNetUnfolderBase]: For 96503/96517 co-relation queries the response was YES. [2024-06-20 15:14:15,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22026 conditions, 3951 events. 2281/3951 cut-off events. For 96503/96517 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26043 event pairs, 908 based on Foata normal form. 56/4006 useless extension candidates. Maximal degree in co-relation 21964. Up to 3264 conditions per place. [2024-06-20 15:14:15,116 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 51 changer transitions 3/185 dead transitions. [2024-06-20 15:14:15,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2174 flow [2024-06-20 15:14:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:14:15,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-20 15:14:15,117 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1614 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:14:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2174 flow [2024-06-20 15:14:15,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 2147 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:15,208 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1724 flow [2024-06-20 15:14:15,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-06-20 15:14:15,209 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-20 15:14:15,209 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1724 flow [2024-06-20 15:14:15,209 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) [2024-06-20 15:14:15,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:14:15,210 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:15,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash 654581351, now seen corresponding path program 5 times [2024-06-20 15:14:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86941478] [2024-06-20 15:14:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:15,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86941478] [2024-06-20 15:14:15,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86941478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797290766] [2024-06-20 15:14:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:15,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:15,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1724 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) [2024-06-20 15:14:15,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:15,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:15,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,837 INFO L124 PetriNetUnfolderBase]: 2405/4165 cut-off events. [2024-06-20 15:14:15,838 INFO L125 PetriNetUnfolderBase]: For 107369/107383 co-relation queries the response was YES. [2024-06-20 15:14:15,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23292 conditions, 4165 events. 2405/4165 cut-off events. For 107369/107383 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27803 event pairs, 955 based on Foata normal form. 56/4216 useless extension candidates. Maximal degree in co-relation 23228. Up to 3434 conditions per place. [2024-06-20 15:14:15,865 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 46 changer transitions 0/180 dead transitions. [2024-06-20 15:14:15,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2266 flow [2024-06-20 15:14:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:14:15,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-06-20 15:14:15,866 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1724 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:14:15,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2266 flow [2024-06-20 15:14:15,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 2135 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:15,951 INFO L231 Difference]: Finished difference. Result has 136 places, 147 transitions, 1735 flow [2024-06-20 15:14:15,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1735, PETRI_PLACES=136, PETRI_TRANSITIONS=147} [2024-06-20 15:14:15,951 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 96 predicate places. [2024-06-20 15:14:15,952 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 147 transitions, 1735 flow [2024-06-20 15:14:15,952 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) [2024-06-20 15:14:15,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:14:15,952 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:15,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash 654433481, now seen corresponding path program 6 times [2024-06-20 15:14:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69872168] [2024-06-20 15:14:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69872168] [2024-06-20 15:14:16,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69872168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122006720] [2024-06-20 15:14:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:16,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:16,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:16,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 147 transitions, 1735 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) [2024-06-20 15:14:16,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:16,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:16,562 INFO L124 PetriNetUnfolderBase]: 2475/4331 cut-off events. [2024-06-20 15:14:16,563 INFO L125 PetriNetUnfolderBase]: For 106436/106450 co-relation queries the response was YES. [2024-06-20 15:14:16,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23412 conditions, 4331 events. 2475/4331 cut-off events. For 106436/106450 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29459 event pairs, 851 based on Foata normal form. 50/4380 useless extension candidates. Maximal degree in co-relation 23347. Up to 2675 conditions per place. [2024-06-20 15:14:16,591 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 135 selfloop transitions, 47 changer transitions 0/189 dead transitions. [2024-06-20 15:14:16,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 189 transitions, 2413 flow [2024-06-20 15:14:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:14:16,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673992673992674 [2024-06-20 15:14:16,592 INFO L175 Difference]: Start difference. First operand has 136 places, 147 transitions, 1735 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:14:16,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 189 transitions, 2413 flow [2024-06-20 15:14:16,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 2291 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:16,680 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1801 flow [2024-06-20 15:14:16,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-20 15:14:16,681 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 99 predicate places. [2024-06-20 15:14:16,681 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1801 flow [2024-06-20 15:14:16,681 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) [2024-06-20 15:14:16,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:14:16,682 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:16,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash 660158933, now seen corresponding path program 1 times [2024-06-20 15:14:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928975681] [2024-06-20 15:14:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928975681] [2024-06-20 15:14:16,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928975681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586094778] [2024-06-20 15:14:16,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:16,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:16,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1801 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) [2024-06-20 15:14:16,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:16,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,401 INFO L124 PetriNetUnfolderBase]: 2584/4522 cut-off events. [2024-06-20 15:14:17,402 INFO L125 PetriNetUnfolderBase]: For 115805/115819 co-relation queries the response was YES. [2024-06-20 15:14:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 4522 events. 2584/4522 cut-off events. For 115805/115819 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31118 event pairs, 910 based on Foata normal form. 50/4567 useless extension candidates. Maximal degree in co-relation 24328. Up to 3238 conditions per place. [2024-06-20 15:14:17,434 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 127 selfloop transitions, 55 changer transitions 5/194 dead transitions. [2024-06-20 15:14:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 2427 flow [2024-06-20 15:14:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 15:14:17,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-20 15:14:17,435 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1801 flow. Second operand 9 states and 224 transitions. [2024-06-20 15:14:17,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 2427 flow [2024-06-20 15:14:17,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 2282 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:17,561 INFO L231 Difference]: Finished difference. Result has 143 places, 148 transitions, 1793 flow [2024-06-20 15:14:17,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1793, PETRI_PLACES=143, PETRI_TRANSITIONS=148} [2024-06-20 15:14:17,562 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-20 15:14:17,562 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 148 transitions, 1793 flow [2024-06-20 15:14:17,562 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) [2024-06-20 15:14:17,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:17,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:17,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:14:17,562 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)] === [2024-06-20 15:14:17,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1270899473, now seen corresponding path program 2 times [2024-06-20 15:14:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549378110] [2024-06-20 15:14:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:17,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:17,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:17,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549378110] [2024-06-20 15:14:17,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549378110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:17,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:17,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:17,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578487754] [2024-06-20 15:14:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:17,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:17,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:17,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:17,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 148 transitions, 1793 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:17,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:17,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,081 INFO L124 PetriNetUnfolderBase]: 2407/4219 cut-off events. [2024-06-20 15:14:18,082 INFO L125 PetriNetUnfolderBase]: For 102126/102128 co-relation queries the response was YES. [2024-06-20 15:14:18,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23137 conditions, 4219 events. 2407/4219 cut-off events. For 102126/102128 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28514 event pairs, 992 based on Foata normal form. 1/4218 useless extension candidates. Maximal degree in co-relation 23069. Up to 3849 conditions per place. [2024-06-20 15:14:18,110 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 133 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-20 15:14:18,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 158 transitions, 2124 flow [2024-06-20 15:14:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-20 15:14:18,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-20 15:14:18,111 INFO L175 Difference]: Start difference. First operand has 143 places, 148 transitions, 1793 flow. Second operand 5 states and 115 transitions. [2024-06-20 15:14:18,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 158 transitions, 2124 flow [2024-06-20 15:14:18,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 158 transitions, 1974 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:18,210 INFO L231 Difference]: Finished difference. Result has 141 places, 148 transitions, 1685 flow [2024-06-20 15:14:18,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1685, PETRI_PLACES=141, PETRI_TRANSITIONS=148} [2024-06-20 15:14:18,210 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 101 predicate places. [2024-06-20 15:14:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 148 transitions, 1685 flow [2024-06-20 15:14:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:14:18,211 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 101075059, now seen corresponding path program 7 times [2024-06-20 15:14:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659992804] [2024-06-20 15:14:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:18,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659992804] [2024-06-20 15:14:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659992804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:18,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:18,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265038790] [2024-06-20 15:14:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:18,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:18,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 1685 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) [2024-06-20 15:14:18,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:18,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:18,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,841 INFO L124 PetriNetUnfolderBase]: 2516/4401 cut-off events. [2024-06-20 15:14:18,842 INFO L125 PetriNetUnfolderBase]: For 126242/126256 co-relation queries the response was YES. [2024-06-20 15:14:18,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23609 conditions, 4401 events. 2516/4401 cut-off events. For 126242/126256 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29957 event pairs, 1035 based on Foata normal form. 56/4448 useless extension candidates. Maximal degree in co-relation 23540. Up to 3637 conditions per place. [2024-06-20 15:14:18,869 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 116 selfloop transitions, 68 changer transitions 3/194 dead transitions. [2024-06-20 15:14:18,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 194 transitions, 2489 flow [2024-06-20 15:14:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 15:14:18,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-20 15:14:18,871 INFO L175 Difference]: Start difference. First operand has 141 places, 148 transitions, 1685 flow. Second operand 9 states and 225 transitions. [2024-06-20 15:14:18,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 194 transitions, 2489 flow [2024-06-20 15:14:18,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 194 transitions, 2453 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:18,976 INFO L231 Difference]: Finished difference. Result has 146 places, 148 transitions, 1835 flow [2024-06-20 15:14:18,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1835, PETRI_PLACES=146, PETRI_TRANSITIONS=148} [2024-06-20 15:14:18,977 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2024-06-20 15:14:18,977 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 148 transitions, 1835 flow [2024-06-20 15:14:18,977 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) [2024-06-20 15:14:18,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:14:18,977 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:18,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash -118417609, now seen corresponding path program 2 times [2024-06-20 15:14:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497713434] [2024-06-20 15:14:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497713434] [2024-06-20 15:14:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497713434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655313912] [2024-06-20 15:14:19,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:19,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:19,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 148 transitions, 1835 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) [2024-06-20 15:14:19,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:19,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:19,645 INFO L124 PetriNetUnfolderBase]: 2615/4600 cut-off events. [2024-06-20 15:14:19,645 INFO L125 PetriNetUnfolderBase]: For 134900/134914 co-relation queries the response was YES. [2024-06-20 15:14:19,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24894 conditions, 4600 events. 2615/4600 cut-off events. For 134900/134914 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31845 event pairs, 1035 based on Foata normal form. 50/4641 useless extension candidates. Maximal degree in co-relation 24824. Up to 3573 conditions per place. [2024-06-20 15:14:19,674 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 121 selfloop transitions, 70 changer transitions 6/204 dead transitions. [2024-06-20 15:14:19,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 204 transitions, 2715 flow [2024-06-20 15:14:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-20 15:14:19,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-20 15:14:19,677 INFO L175 Difference]: Start difference. First operand has 146 places, 148 transitions, 1835 flow. Second operand 10 states and 250 transitions. [2024-06-20 15:14:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 204 transitions, 2715 flow [2024-06-20 15:14:19,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 204 transitions, 2542 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:19,792 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1849 flow [2024-06-20 15:14:19,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1849, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2024-06-20 15:14:19,792 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-20 15:14:19,792 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1849 flow [2024-06-20 15:14:19,792 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) [2024-06-20 15:14:19,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:19,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:14:19,793 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:19,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 147279671, now seen corresponding path program 3 times [2024-06-20 15:14:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:19,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058950541] [2024-06-20 15:14:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:19,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058950541] [2024-06-20 15:14:19,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058950541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:19,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445868420] [2024-06-20 15:14:19,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:19,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:19,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:19,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:19,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1849 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) [2024-06-20 15:14:19,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:19,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:20,525 INFO L124 PetriNetUnfolderBase]: 2760/4829 cut-off events. [2024-06-20 15:14:20,525 INFO L125 PetriNetUnfolderBase]: For 148404/148418 co-relation queries the response was YES. [2024-06-20 15:14:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25987 conditions, 4829 events. 2760/4829 cut-off events. For 148404/148418 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33660 event pairs, 1000 based on Foata normal form. 50/4868 useless extension candidates. Maximal degree in co-relation 25916. Up to 2795 conditions per place. [2024-06-20 15:14:20,560 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 113 selfloop transitions, 75 changer transitions 8/203 dead transitions. [2024-06-20 15:14:20,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2711 flow [2024-06-20 15:14:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-20 15:14:20,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6609686609686609 [2024-06-20 15:14:20,561 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1849 flow. Second operand 9 states and 232 transitions. [2024-06-20 15:14:20,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2711 flow [2024-06-20 15:14:20,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 203 transitions, 2531 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:20,700 INFO L231 Difference]: Finished difference. Result has 149 places, 145 transitions, 1732 flow [2024-06-20 15:14:20,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1732, PETRI_PLACES=149, PETRI_TRANSITIONS=145} [2024-06-20 15:14:20,701 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-20 15:14:20,701 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 145 transitions, 1732 flow [2024-06-20 15:14:20,701 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) [2024-06-20 15:14:20,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:20,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:20,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:14:20,701 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:20,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash -177938721, now seen corresponding path program 3 times [2024-06-20 15:14:20,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:20,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672929606] [2024-06-20 15:14:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:20,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672929606] [2024-06-20 15:14:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672929606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526362450] [2024-06-20 15:14:20,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:20,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:20,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 145 transitions, 1732 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:20,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,218 INFO L124 PetriNetUnfolderBase]: 2484/4367 cut-off events. [2024-06-20 15:14:21,218 INFO L125 PetriNetUnfolderBase]: For 133040/133042 co-relation queries the response was YES. [2024-06-20 15:14:21,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24297 conditions, 4367 events. 2484/4367 cut-off events. For 133040/133042 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29872 event pairs, 1053 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 24225. Up to 3987 conditions per place. [2024-06-20 15:14:21,252 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 131 selfloop transitions, 23 changer transitions 0/161 dead transitions. [2024-06-20 15:14:21,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 161 transitions, 2128 flow [2024-06-20 15:14:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-20 15:14:21,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-20 15:14:21,253 INFO L175 Difference]: Start difference. First operand has 149 places, 145 transitions, 1732 flow. Second operand 6 states and 132 transitions. [2024-06-20 15:14:21,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 161 transitions, 2128 flow [2024-06-20 15:14:21,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 161 transitions, 1920 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:21,376 INFO L231 Difference]: Finished difference. Result has 149 places, 150 transitions, 1647 flow [2024-06-20 15:14:21,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1647, PETRI_PLACES=149, PETRI_TRANSITIONS=150} [2024-06-20 15:14:21,377 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-20 15:14:21,377 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 150 transitions, 1647 flow [2024-06-20 15:14:21,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:21,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:21,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:14:21,378 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:21,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash -392739824, now seen corresponding path program 1 times [2024-06-20 15:14:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500606027] [2024-06-20 15:14:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:21,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:21,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500606027] [2024-06-20 15:14:21,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500606027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:21,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:21,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021082565] [2024-06-20 15:14:21,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:21,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:21,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:21,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:21,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 150 transitions, 1647 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:21,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:21,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,923 INFO L124 PetriNetUnfolderBase]: 2333/4143 cut-off events. [2024-06-20 15:14:21,923 INFO L125 PetriNetUnfolderBase]: For 126659/126666 co-relation queries the response was YES. [2024-06-20 15:14:21,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 4143 events. 2333/4143 cut-off events. For 126659/126666 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28394 event pairs, 926 based on Foata normal form. 17/4139 useless extension candidates. Maximal degree in co-relation 22173. Up to 3620 conditions per place. [2024-06-20 15:14:21,953 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 123 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-20 15:14:21,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 169 transitions, 2043 flow [2024-06-20 15:14:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:14:21,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 15:14:21,954 INFO L175 Difference]: Start difference. First operand has 149 places, 150 transitions, 1647 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:14:21,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 169 transitions, 2043 flow [2024-06-20 15:14:22,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 169 transitions, 1979 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:22,067 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 1693 flow [2024-06-20 15:14:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1693, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2024-06-20 15:14:22,068 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-20 15:14:22,068 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 1693 flow [2024-06-20 15:14:22,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:14:22,068 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:22,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash 653020910, now seen corresponding path program 2 times [2024-06-20 15:14:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959331011] [2024-06-20 15:14:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:22,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:22,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959331011] [2024-06-20 15:14:22,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959331011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:22,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:22,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:22,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304285042] [2024-06-20 15:14:22,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:22,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:22,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:22,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:22,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:22,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 1693 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:22,617 INFO L124 PetriNetUnfolderBase]: 2373/4200 cut-off events. [2024-06-20 15:14:22,617 INFO L125 PetriNetUnfolderBase]: For 134565/134572 co-relation queries the response was YES. [2024-06-20 15:14:22,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22963 conditions, 4200 events. 2373/4200 cut-off events. For 134565/134572 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28767 event pairs, 977 based on Foata normal form. 17/4194 useless extension candidates. Maximal degree in co-relation 22888. Up to 3702 conditions per place. [2024-06-20 15:14:22,645 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 39 changer transitions 0/170 dead transitions. [2024-06-20 15:14:22,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 170 transitions, 2231 flow [2024-06-20 15:14:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:14:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 15:14:22,646 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 1693 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:14:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 170 transitions, 2231 flow [2024-06-20 15:14:22,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 170 transitions, 2157 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:22,765 INFO L231 Difference]: Finished difference. Result has 154 places, 154 transitions, 1748 flow [2024-06-20 15:14:22,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1748, PETRI_PLACES=154, PETRI_TRANSITIONS=154} [2024-06-20 15:14:22,766 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-20 15:14:22,766 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 154 transitions, 1748 flow [2024-06-20 15:14:22,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:14:22,767 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:22,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash 666353390, now seen corresponding path program 3 times [2024-06-20 15:14:22,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275960872] [2024-06-20 15:14:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:22,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275960872] [2024-06-20 15:14:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275960872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150699089] [2024-06-20 15:14:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:22,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:22,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:22,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-20 15:14:22,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 154 transitions, 1748 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-20 15:14:22,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:23,289 INFO L124 PetriNetUnfolderBase]: 2438/4301 cut-off events. [2024-06-20 15:14:23,289 INFO L125 PetriNetUnfolderBase]: For 144931/144938 co-relation queries the response was YES. [2024-06-20 15:14:23,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23775 conditions, 4301 events. 2438/4301 cut-off events. For 144931/144938 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29532 event pairs, 944 based on Foata normal form. 17/4295 useless extension candidates. Maximal degree in co-relation 23699. Up to 3605 conditions per place. [2024-06-20 15:14:23,321 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 44 changer transitions 0/178 dead transitions. [2024-06-20 15:14:23,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 2424 flow [2024-06-20 15:14:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:14:23,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-20 15:14:23,323 INFO L175 Difference]: Start difference. First operand has 154 places, 154 transitions, 1748 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:14:23,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 2424 flow [2024-06-20 15:14:23,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 178 transitions, 2319 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:23,441 INFO L231 Difference]: Finished difference. Result has 156 places, 157 transitions, 1800 flow [2024-06-20 15:14:23,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1800, PETRI_PLACES=156, PETRI_TRANSITIONS=157} [2024-06-20 15:14:23,441 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-06-20 15:14:23,441 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 157 transitions, 1800 flow [2024-06-20 15:14:23,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:23,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:14:23,442 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:23,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 417001180, now seen corresponding path program 1 times [2024-06-20 15:14:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:23,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54444650] [2024-06-20 15:14:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:23,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:23,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54444650] [2024-06-20 15:14:23,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54444650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:23,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:23,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:23,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553990870] [2024-06-20 15:14:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:23,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:23,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:23,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:23,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:23,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 157 transitions, 1800 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:23,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:23,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,013 INFO L124 PetriNetUnfolderBase]: 2511/4408 cut-off events. [2024-06-20 15:14:24,014 INFO L125 PetriNetUnfolderBase]: For 145782/145794 co-relation queries the response was YES. [2024-06-20 15:14:24,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24514 conditions, 4408 events. 2511/4408 cut-off events. For 145782/145794 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30142 event pairs, 1011 based on Foata normal form. 14/4421 useless extension candidates. Maximal degree in co-relation 24437. Up to 3889 conditions per place. [2024-06-20 15:14:24,049 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 55 changer transitions 1/193 dead transitions. [2024-06-20 15:14:24,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 193 transitions, 2428 flow [2024-06-20 15:14:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:14:24,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096866096866097 [2024-06-20 15:14:24,050 INFO L175 Difference]: Start difference. First operand has 156 places, 157 transitions, 1800 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:14:24,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 193 transitions, 2428 flow [2024-06-20 15:14:24,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 193 transitions, 2347 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:24,188 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1856 flow [2024-06-20 15:14:24,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1856, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2024-06-20 15:14:24,188 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-20 15:14:24,188 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1856 flow [2024-06-20 15:14:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:24,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:24,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:14:24,189 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:24,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash 422715100, now seen corresponding path program 2 times [2024-06-20 15:14:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:24,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452956443] [2024-06-20 15:14:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452956443] [2024-06-20 15:14:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452956443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:24,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247644298] [2024-06-20 15:14:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:24,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:24,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1856 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:24,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:24,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,764 INFO L124 PetriNetUnfolderBase]: 2530/4439 cut-off events. [2024-06-20 15:14:24,764 INFO L125 PetriNetUnfolderBase]: For 153187/153199 co-relation queries the response was YES. [2024-06-20 15:14:24,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24995 conditions, 4439 events. 2530/4439 cut-off events. For 153187/153199 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30362 event pairs, 1011 based on Foata normal form. 13/4451 useless extension candidates. Maximal degree in co-relation 24916. Up to 3908 conditions per place. [2024-06-20 15:14:24,792 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 61 changer transitions 1/192 dead transitions. [2024-06-20 15:14:24,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 192 transitions, 2540 flow [2024-06-20 15:14:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:14:24,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-20 15:14:24,793 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1856 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:14:24,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 192 transitions, 2540 flow [2024-06-20 15:14:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 192 transitions, 2434 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:24,954 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1985 flow [2024-06-20 15:14:24,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1985, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2024-06-20 15:14:24,955 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-20 15:14:24,955 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1985 flow [2024-06-20 15:14:24,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:24,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:24,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:14:24,955 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:24,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 414141244, now seen corresponding path program 1 times [2024-06-20 15:14:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796428259] [2024-06-20 15:14:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796428259] [2024-06-20 15:14:25,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796428259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:25,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399927403] [2024-06-20 15:14:25,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:25,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:25,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:25,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 1985 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:25,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:25,583 INFO L124 PetriNetUnfolderBase]: 2548/4467 cut-off events. [2024-06-20 15:14:25,584 INFO L125 PetriNetUnfolderBase]: For 164547/164555 co-relation queries the response was YES. [2024-06-20 15:14:25,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25352 conditions, 4467 events. 2548/4467 cut-off events. For 164547/164555 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30450 event pairs, 910 based on Foata normal form. 14/4480 useless extension candidates. Maximal degree in co-relation 25271. Up to 3976 conditions per place. [2024-06-20 15:14:25,616 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 166 selfloop transitions, 23 changer transitions 0/196 dead transitions. [2024-06-20 15:14:25,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 196 transitions, 2549 flow [2024-06-20 15:14:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:14:25,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-20 15:14:25,618 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1985 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:14:25,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 196 transitions, 2549 flow [2024-06-20 15:14:25,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 196 transitions, 2464 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:25,786 INFO L231 Difference]: Finished difference. Result has 170 places, 166 transitions, 1959 flow [2024-06-20 15:14:25,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=170, PETRI_TRANSITIONS=166} [2024-06-20 15:14:25,786 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-20 15:14:25,787 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 166 transitions, 1959 flow [2024-06-20 15:14:25,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:25,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:14:25,787 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:25,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash 414380254, now seen corresponding path program 2 times [2024-06-20 15:14:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:25,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438040369] [2024-06-20 15:14:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438040369] [2024-06-20 15:14:25,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438040369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:25,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928219227] [2024-06-20 15:14:25,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:25,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:25,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 166 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:25,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:26,386 INFO L124 PetriNetUnfolderBase]: 2576/4511 cut-off events. [2024-06-20 15:14:26,387 INFO L125 PetriNetUnfolderBase]: For 173851/173859 co-relation queries the response was YES. [2024-06-20 15:14:26,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25661 conditions, 4511 events. 2576/4511 cut-off events. For 173851/173859 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30823 event pairs, 1004 based on Foata normal form. 16/4526 useless extension candidates. Maximal degree in co-relation 25579. Up to 4096 conditions per place. [2024-06-20 15:14:26,424 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 163 selfloop transitions, 20 changer transitions 0/190 dead transitions. [2024-06-20 15:14:26,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 190 transitions, 2411 flow [2024-06-20 15:14:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-20 15:14:26,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-20 15:14:26,426 INFO L175 Difference]: Start difference. First operand has 170 places, 166 transitions, 1959 flow. Second operand 8 states and 174 transitions. [2024-06-20 15:14:26,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 190 transitions, 2411 flow [2024-06-20 15:14:26,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 190 transitions, 2372 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:26,624 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 1978 flow [2024-06-20 15:14:26,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-06-20 15:14:26,624 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-20 15:14:26,625 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 1978 flow [2024-06-20 15:14:26,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:26,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:26,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:14:26,625 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:26,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash 532292350, now seen corresponding path program 3 times [2024-06-20 15:14:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210763546] [2024-06-20 15:14:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:26,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:26,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:26,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210763546] [2024-06-20 15:14:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210763546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:26,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:26,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92484277] [2024-06-20 15:14:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:26,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:26,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:26,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 1978 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:26,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:26,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:27,277 INFO L124 PetriNetUnfolderBase]: 2570/4505 cut-off events. [2024-06-20 15:14:27,277 INFO L125 PetriNetUnfolderBase]: For 174908/174920 co-relation queries the response was YES. [2024-06-20 15:14:27,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25704 conditions, 4505 events. 2570/4505 cut-off events. For 174908/174920 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30833 event pairs, 1017 based on Foata normal form. 14/4518 useless extension candidates. Maximal degree in co-relation 25621. Up to 4014 conditions per place. [2024-06-20 15:14:27,312 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 132 selfloop transitions, 47 changer transitions 1/187 dead transitions. [2024-06-20 15:14:27,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 187 transitions, 2470 flow [2024-06-20 15:14:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:14:27,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-20 15:14:27,313 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 1978 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:14:27,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 187 transitions, 2470 flow [2024-06-20 15:14:27,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 187 transitions, 2427 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:27,512 INFO L231 Difference]: Finished difference. Result has 173 places, 166 transitions, 2029 flow [2024-06-20 15:14:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2029, PETRI_PLACES=173, PETRI_TRANSITIONS=166} [2024-06-20 15:14:27,513 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-20 15:14:27,513 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 166 transitions, 2029 flow [2024-06-20 15:14:27,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:14:27,513 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:27,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash 13774176, now seen corresponding path program 4 times [2024-06-20 15:14:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060839936] [2024-06-20 15:14:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060839936] [2024-06-20 15:14:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060839936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:27,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520561390] [2024-06-20 15:14:27,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:27,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:27,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:27,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 166 transitions, 2029 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:27,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,189 INFO L124 PetriNetUnfolderBase]: 2535/4440 cut-off events. [2024-06-20 15:14:28,190 INFO L125 PetriNetUnfolderBase]: For 181059/181071 co-relation queries the response was YES. [2024-06-20 15:14:28,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25591 conditions, 4440 events. 2535/4440 cut-off events. For 181059/181071 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30273 event pairs, 999 based on Foata normal form. 14/4453 useless extension candidates. Maximal degree in co-relation 25507. Up to 3955 conditions per place. [2024-06-20 15:14:28,224 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 130 selfloop transitions, 48 changer transitions 2/187 dead transitions. [2024-06-20 15:14:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 187 transitions, 2441 flow [2024-06-20 15:14:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:14:28,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-20 15:14:28,231 INFO L175 Difference]: Start difference. First operand has 173 places, 166 transitions, 2029 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:14:28,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 187 transitions, 2441 flow [2024-06-20 15:14:28,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 187 transitions, 2355 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:28,452 INFO L231 Difference]: Finished difference. Result has 176 places, 164 transitions, 2020 flow [2024-06-20 15:14:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=168, 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=8, PETRI_FLOW=2020, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2024-06-20 15:14:28,453 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-20 15:14:28,453 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 2020 flow [2024-06-20 15:14:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:14:28,453 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1563719792, now seen corresponding path program 5 times [2024-06-20 15:14:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:28,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735869366] [2024-06-20 15:14:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:28,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:28,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:28,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735869366] [2024-06-20 15:14:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735869366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:28,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:28,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:28,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11395760] [2024-06-20 15:14:28,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:28,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:28,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:28,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:28,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 2020 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:28,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:28,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:29,151 INFO L124 PetriNetUnfolderBase]: 2422/4239 cut-off events. [2024-06-20 15:14:29,152 INFO L125 PetriNetUnfolderBase]: For 178902/178908 co-relation queries the response was YES. [2024-06-20 15:14:29,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24815 conditions, 4239 events. 2422/4239 cut-off events. For 178902/178908 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28572 event pairs, 960 based on Foata normal form. 5/4242 useless extension candidates. Maximal degree in co-relation 24731. Up to 3730 conditions per place. [2024-06-20 15:14:29,190 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 112 selfloop transitions, 57 changer transitions 2/178 dead transitions. [2024-06-20 15:14:29,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 2396 flow [2024-06-20 15:14:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 15:14:29,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824175824175825 [2024-06-20 15:14:29,191 INFO L175 Difference]: Start difference. First operand has 176 places, 164 transitions, 2020 flow. Second operand 7 states and 159 transitions. [2024-06-20 15:14:29,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 2396 flow [2024-06-20 15:14:29,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 178 transitions, 2215 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 15:14:29,416 INFO L231 Difference]: Finished difference. Result has 172 places, 162 transitions, 1936 flow [2024-06-20 15:14:29,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1936, PETRI_PLACES=172, PETRI_TRANSITIONS=162} [2024-06-20 15:14:29,416 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-20 15:14:29,416 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 162 transitions, 1936 flow [2024-06-20 15:14:29,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:29,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:29,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:14:29,417 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:29,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1563716816, now seen corresponding path program 3 times [2024-06-20 15:14:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:29,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902177272] [2024-06-20 15:14:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:29,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:29,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:29,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902177272] [2024-06-20 15:14:29,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902177272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:29,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162126856] [2024-06-20 15:14:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:29,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:29,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:29,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 162 transitions, 1936 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:29,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:29,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:30,029 INFO L124 PetriNetUnfolderBase]: 2321/4072 cut-off events. [2024-06-20 15:14:30,029 INFO L125 PetriNetUnfolderBase]: For 176678/176680 co-relation queries the response was YES. [2024-06-20 15:14:30,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23793 conditions, 4072 events. 2321/4072 cut-off events. For 176678/176680 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27237 event pairs, 895 based on Foata normal form. 8/4078 useless extension candidates. Maximal degree in co-relation 23710. Up to 3666 conditions per place. [2024-06-20 15:14:30,057 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 151 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-20 15:14:30,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 177 transitions, 2331 flow [2024-06-20 15:14:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 15:14:30,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726495726495726 [2024-06-20 15:14:30,058 INFO L175 Difference]: Start difference. First operand has 172 places, 162 transitions, 1936 flow. Second operand 6 states and 134 transitions. [2024-06-20 15:14:30,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 177 transitions, 2331 flow [2024-06-20 15:14:30,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 177 transitions, 2178 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:30,256 INFO L231 Difference]: Finished difference. Result has 170 places, 162 transitions, 1826 flow [2024-06-20 15:14:30,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1826, PETRI_PLACES=170, PETRI_TRANSITIONS=162} [2024-06-20 15:14:30,257 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-20 15:14:30,257 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 162 transitions, 1826 flow [2024-06-20 15:14:30,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:14:30,257 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:30,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1564085778, now seen corresponding path program 1 times [2024-06-20 15:14:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437071456] [2024-06-20 15:14:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437071456] [2024-06-20 15:14:30,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437071456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732463187] [2024-06-20 15:14:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:30,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:30,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:30,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 162 transitions, 1826 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:30,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:30,813 INFO L124 PetriNetUnfolderBase]: 2341/4104 cut-off events. [2024-06-20 15:14:30,813 INFO L125 PetriNetUnfolderBase]: For 182460/182462 co-relation queries the response was YES. [2024-06-20 15:14:30,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23999 conditions, 4104 events. 2341/4104 cut-off events. For 182460/182462 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27497 event pairs, 879 based on Foata normal form. 6/4108 useless extension candidates. Maximal degree in co-relation 23915. Up to 3630 conditions per place. [2024-06-20 15:14:30,846 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 154 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-20 15:14:30,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 184 transitions, 2300 flow [2024-06-20 15:14:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 15:14:30,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854700854700855 [2024-06-20 15:14:30,847 INFO L175 Difference]: Start difference. First operand has 170 places, 162 transitions, 1826 flow. Second operand 6 states and 137 transitions. [2024-06-20 15:14:30,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 184 transitions, 2300 flow [2024-06-20 15:14:31,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 184 transitions, 2252 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:31,057 INFO L231 Difference]: Finished difference. Result has 172 places, 166 transitions, 1896 flow [2024-06-20 15:14:31,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1896, PETRI_PLACES=172, PETRI_TRANSITIONS=166} [2024-06-20 15:14:31,057 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-06-20 15:14:31,058 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 166 transitions, 1896 flow [2024-06-20 15:14:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:31,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:14:31,058 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:31,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1820691490, now seen corresponding path program 1 times [2024-06-20 15:14:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810922540] [2024-06-20 15:14:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:31,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810922540] [2024-06-20 15:14:31,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810922540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:31,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:31,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99427490] [2024-06-20 15:14:31,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:31,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:31,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 166 transitions, 1896 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:31,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:31,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,600 INFO L124 PetriNetUnfolderBase]: 2338/4101 cut-off events. [2024-06-20 15:14:31,601 INFO L125 PetriNetUnfolderBase]: For 185060/185072 co-relation queries the response was YES. [2024-06-20 15:14:31,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24234 conditions, 4101 events. 2338/4101 cut-off events. For 185060/185072 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27496 event pairs, 903 based on Foata normal form. 13/4108 useless extension candidates. Maximal degree in co-relation 24148. Up to 3663 conditions per place. [2024-06-20 15:14:31,639 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 142 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-20 15:14:31,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2378 flow [2024-06-20 15:14:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:14:31,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-20 15:14:31,640 INFO L175 Difference]: Start difference. First operand has 172 places, 166 transitions, 1896 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:14:31,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2378 flow [2024-06-20 15:14:31,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 183 transitions, 2321 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:31,957 INFO L231 Difference]: Finished difference. Result has 175 places, 166 transitions, 1913 flow [2024-06-20 15:14:31,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1913, PETRI_PLACES=175, PETRI_TRANSITIONS=166} [2024-06-20 15:14:31,957 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-20 15:14:31,958 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 166 transitions, 1913 flow [2024-06-20 15:14:31,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:31,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:14:31,958 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:31,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2122860070, now seen corresponding path program 2 times [2024-06-20 15:14:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442422313] [2024-06-20 15:14:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442422313] [2024-06-20 15:14:32,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442422313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390477823] [2024-06-20 15:14:32,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:32,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:32,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 166 transitions, 1913 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:32,486 INFO L124 PetriNetUnfolderBase]: 2335/4100 cut-off events. [2024-06-20 15:14:32,486 INFO L125 PetriNetUnfolderBase]: For 190938/190946 co-relation queries the response was YES. [2024-06-20 15:14:32,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 4100 events. 2335/4100 cut-off events. For 190938/190946 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27491 event pairs, 912 based on Foata normal form. 9/4107 useless extension candidates. Maximal degree in co-relation 24168. Up to 3660 conditions per place. [2024-06-20 15:14:32,519 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 37 changer transitions 0/176 dead transitions. [2024-06-20 15:14:32,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 176 transitions, 2275 flow [2024-06-20 15:14:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 15:14:32,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-20 15:14:32,520 INFO L175 Difference]: Start difference. First operand has 175 places, 166 transitions, 1913 flow. Second operand 6 states and 135 transitions. [2024-06-20 15:14:32,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 176 transitions, 2275 flow [2024-06-20 15:14:32,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 2175 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:32,781 INFO L231 Difference]: Finished difference. Result has 176 places, 166 transitions, 1893 flow [2024-06-20 15:14:32,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1893, PETRI_PLACES=176, PETRI_TRANSITIONS=166} [2024-06-20 15:14:32,782 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-20 15:14:32,782 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 166 transitions, 1893 flow [2024-06-20 15:14:32,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:14:32,782 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:32,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1008470580, now seen corresponding path program 6 times [2024-06-20 15:14:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487947761] [2024-06-20 15:14:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487947761] [2024-06-20 15:14:32,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487947761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523553199] [2024-06-20 15:14:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 166 transitions, 1893 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,361 INFO L124 PetriNetUnfolderBase]: 2337/4108 cut-off events. [2024-06-20 15:14:33,361 INFO L125 PetriNetUnfolderBase]: For 198591/198599 co-relation queries the response was YES. [2024-06-20 15:14:33,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24378 conditions, 4108 events. 2337/4108 cut-off events. For 198591/198599 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27608 event pairs, 914 based on Foata normal form. 10/4116 useless extension candidates. Maximal degree in co-relation 24290. Up to 3571 conditions per place. [2024-06-20 15:14:33,395 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 106 selfloop transitions, 76 changer transitions 0/189 dead transitions. [2024-06-20 15:14:33,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 189 transitions, 2518 flow [2024-06-20 15:14:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:14:33,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-20 15:14:33,397 INFO L175 Difference]: Start difference. First operand has 176 places, 166 transitions, 1893 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:14:33,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 189 transitions, 2518 flow [2024-06-20 15:14:33,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 189 transitions, 2409 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:33,706 INFO L231 Difference]: Finished difference. Result has 178 places, 169 transitions, 1976 flow [2024-06-20 15:14:33,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1976, PETRI_PLACES=178, PETRI_TRANSITIONS=169} [2024-06-20 15:14:33,707 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 138 predicate places. [2024-06-20 15:14:33,707 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 169 transitions, 1976 flow [2024-06-20 15:14:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:33,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:33,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:14:33,708 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:33,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash -763521838, now seen corresponding path program 7 times [2024-06-20 15:14:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:33,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939452945] [2024-06-20 15:14:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:33,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939452945] [2024-06-20 15:14:33,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939452945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:33,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:33,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360362374] [2024-06-20 15:14:33,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:33,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:33,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:33,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 169 transitions, 1976 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:33,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:33,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:34,237 INFO L124 PetriNetUnfolderBase]: 2334/4100 cut-off events. [2024-06-20 15:14:34,237 INFO L125 PetriNetUnfolderBase]: For 204807/204809 co-relation queries the response was YES. [2024-06-20 15:14:34,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24532 conditions, 4100 events. 2334/4100 cut-off events. For 204807/204809 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27513 event pairs, 946 based on Foata normal form. 1/4098 useless extension candidates. Maximal degree in co-relation 24444. Up to 3530 conditions per place. [2024-06-20 15:14:34,272 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 98 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-20 15:14:34,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 188 transitions, 2636 flow [2024-06-20 15:14:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:14:34,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-20 15:14:34,273 INFO L175 Difference]: Start difference. First operand has 178 places, 169 transitions, 1976 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:14:34,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 188 transitions, 2636 flow [2024-06-20 15:14:34,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 188 transitions, 2462 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:34,597 INFO L231 Difference]: Finished difference. Result has 180 places, 175 transitions, 2102 flow [2024-06-20 15:14:34,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=180, PETRI_TRANSITIONS=175} [2024-06-20 15:14:34,598 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-20 15:14:34,598 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 175 transitions, 2102 flow [2024-06-20 15:14:34,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:14:34,598 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:34,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash -763524814, now seen corresponding path program 4 times [2024-06-20 15:14:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239118127] [2024-06-20 15:14:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:34,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239118127] [2024-06-20 15:14:34,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239118127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:34,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:34,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:34,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974788101] [2024-06-20 15:14:34,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:34,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:34,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:34,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:34,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 175 transitions, 2102 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:34,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:34,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:35,229 INFO L124 PetriNetUnfolderBase]: 2349/4126 cut-off events. [2024-06-20 15:14:35,230 INFO L125 PetriNetUnfolderBase]: For 221806/221808 co-relation queries the response was YES. [2024-06-20 15:14:35,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25603 conditions, 4126 events. 2349/4126 cut-off events. For 221806/221808 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27717 event pairs, 897 based on Foata normal form. 8/4132 useless extension candidates. Maximal degree in co-relation 25513. Up to 3708 conditions per place. [2024-06-20 15:14:35,263 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 161 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2024-06-20 15:14:35,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 192 transitions, 2549 flow [2024-06-20 15:14:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-20 15:14:35,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-20 15:14:35,264 INFO L175 Difference]: Start difference. First operand has 180 places, 175 transitions, 2102 flow. Second operand 7 states and 152 transitions. [2024-06-20 15:14:35,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 192 transitions, 2549 flow [2024-06-20 15:14:35,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 192 transitions, 2444 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:35,579 INFO L231 Difference]: Finished difference. Result has 184 places, 176 transitions, 2068 flow [2024-06-20 15:14:35,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2068, PETRI_PLACES=184, PETRI_TRANSITIONS=176} [2024-06-20 15:14:35,579 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-06-20 15:14:35,579 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 176 transitions, 2068 flow [2024-06-20 15:14:35,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:35,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:35,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:35,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:14:35,580 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:35,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:35,580 INFO L85 PathProgramCache]: Analyzing trace with hash -763155852, now seen corresponding path program 2 times [2024-06-20 15:14:35,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:35,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558562258] [2024-06-20 15:14:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:35,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:35,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558562258] [2024-06-20 15:14:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558562258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:35,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:35,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:35,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237255170] [2024-06-20 15:14:35,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:35,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:35,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:35,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 176 transitions, 2068 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:35,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:35,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:35,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:36,235 INFO L124 PetriNetUnfolderBase]: 2369/4162 cut-off events. [2024-06-20 15:14:36,236 INFO L125 PetriNetUnfolderBase]: For 228748/228750 co-relation queries the response was YES. [2024-06-20 15:14:36,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25996 conditions, 4162 events. 2369/4162 cut-off events. For 228748/228750 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27983 event pairs, 897 based on Foata normal form. 6/4166 useless extension candidates. Maximal degree in co-relation 25903. Up to 3710 conditions per place. [2024-06-20 15:14:36,276 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 165 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-20 15:14:36,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 198 transitions, 2571 flow [2024-06-20 15:14:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 15:14:36,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-20 15:14:36,277 INFO L175 Difference]: Start difference. First operand has 184 places, 176 transitions, 2068 flow. Second operand 7 states and 155 transitions. [2024-06-20 15:14:36,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 198 transitions, 2571 flow [2024-06-20 15:14:36,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 198 transitions, 2512 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:36,669 INFO L231 Difference]: Finished difference. Result has 187 places, 179 transitions, 2119 flow [2024-06-20 15:14:36,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=187, PETRI_TRANSITIONS=179} [2024-06-20 15:14:36,669 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-20 15:14:36,669 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 179 transitions, 2119 flow [2024-06-20 15:14:36,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:36,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:36,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:14:36,670 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:36,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:36,670 INFO L85 PathProgramCache]: Analyzing trace with hash -349848972, now seen corresponding path program 3 times [2024-06-20 15:14:36,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:36,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719080140] [2024-06-20 15:14:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719080140] [2024-06-20 15:14:36,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719080140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:36,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:36,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615859789] [2024-06-20 15:14:36,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:36,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:36,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:36,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:36,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 179 transitions, 2119 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:36,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:36,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:37,314 INFO L124 PetriNetUnfolderBase]: 2356/4143 cut-off events. [2024-06-20 15:14:37,314 INFO L125 PetriNetUnfolderBase]: For 229711/229713 co-relation queries the response was YES. [2024-06-20 15:14:37,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25753 conditions, 4143 events. 2356/4143 cut-off events. For 229711/229713 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27876 event pairs, 876 based on Foata normal form. 6/4147 useless extension candidates. Maximal degree in co-relation 25658. Up to 3559 conditions per place. [2024-06-20 15:14:37,349 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 162 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-20 15:14:37,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 201 transitions, 2613 flow [2024-06-20 15:14:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 15:14:37,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-20 15:14:37,350 INFO L175 Difference]: Start difference. First operand has 187 places, 179 transitions, 2119 flow. Second operand 7 states and 155 transitions. [2024-06-20 15:14:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 201 transitions, 2613 flow [2024-06-20 15:14:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 201 transitions, 2557 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:37,686 INFO L231 Difference]: Finished difference. Result has 192 places, 181 transitions, 2163 flow [2024-06-20 15:14:37,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2163, PETRI_PLACES=192, PETRI_TRANSITIONS=181} [2024-06-20 15:14:37,686 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-20 15:14:37,687 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 181 transitions, 2163 flow [2024-06-20 15:14:37,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:37,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:37,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:14:37,687 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:37,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 403097560, now seen corresponding path program 1 times [2024-06-20 15:14:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:37,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230069667] [2024-06-20 15:14:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:37,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230069667] [2024-06-20 15:14:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230069667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:37,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:37,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:37,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544231652] [2024-06-20 15:14:37,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:37,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:37,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:37,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:37,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 181 transitions, 2163 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:37,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:37,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:38,299 INFO L124 PetriNetUnfolderBase]: 2363/4152 cut-off events. [2024-06-20 15:14:38,300 INFO L125 PetriNetUnfolderBase]: For 235489/235489 co-relation queries the response was YES. [2024-06-20 15:14:38,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25922 conditions, 4152 events. 2363/4152 cut-off events. For 235489/235489 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27904 event pairs, 844 based on Foata normal form. 6/4153 useless extension candidates. Maximal degree in co-relation 25824. Up to 3658 conditions per place. [2024-06-20 15:14:38,331 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 183 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-20 15:14:38,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 205 transitions, 2772 flow [2024-06-20 15:14:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 15:14:38,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256410256410256 [2024-06-20 15:14:38,332 INFO L175 Difference]: Start difference. First operand has 192 places, 181 transitions, 2163 flow. Second operand 5 states and 122 transitions. [2024-06-20 15:14:38,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 205 transitions, 2772 flow [2024-06-20 15:14:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 205 transitions, 2609 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:38,697 INFO L231 Difference]: Finished difference. Result has 190 places, 182 transitions, 2053 flow [2024-06-20 15:14:38,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2053, PETRI_PLACES=190, PETRI_TRANSITIONS=182} [2024-06-20 15:14:38,697 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2024-06-20 15:14:38,698 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 182 transitions, 2053 flow [2024-06-20 15:14:38,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:38,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:14:38,698 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:38,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2083999152, now seen corresponding path program 1 times [2024-06-20 15:14:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:38,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303280380] [2024-06-20 15:14:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:38,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303280380] [2024-06-20 15:14:38,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303280380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:38,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:38,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441385021] [2024-06-20 15:14:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:38,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:38,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 182 transitions, 2053 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:38,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:38,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:39,216 INFO L124 PetriNetUnfolderBase]: 2350/4133 cut-off events. [2024-06-20 15:14:39,216 INFO L125 PetriNetUnfolderBase]: For 235066/235066 co-relation queries the response was YES. [2024-06-20 15:14:39,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25283 conditions, 4133 events. 2350/4133 cut-off events. For 235066/235066 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27784 event pairs, 837 based on Foata normal form. 6/4134 useless extension candidates. Maximal degree in co-relation 25187. Up to 3652 conditions per place. [2024-06-20 15:14:39,251 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 182 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-06-20 15:14:39,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 204 transitions, 2537 flow [2024-06-20 15:14:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 15:14:39,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205128205128205 [2024-06-20 15:14:39,252 INFO L175 Difference]: Start difference. First operand has 190 places, 182 transitions, 2053 flow. Second operand 5 states and 121 transitions. [2024-06-20 15:14:39,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 204 transitions, 2537 flow [2024-06-20 15:14:39,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 204 transitions, 2510 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:39,578 INFO L231 Difference]: Finished difference. Result has 193 places, 182 transitions, 2060 flow [2024-06-20 15:14:39,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2060, PETRI_PLACES=193, PETRI_TRANSITIONS=182} [2024-06-20 15:14:39,578 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2024-06-20 15:14:39,578 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 182 transitions, 2060 flow [2024-06-20 15:14:39,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:39,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:39,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:39,579 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:39,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1889924458, now seen corresponding path program 1 times [2024-06-20 15:14:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:39,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350209922] [2024-06-20 15:14:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:39,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:39,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350209922] [2024-06-20 15:14:39,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350209922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:39,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:39,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59575864] [2024-06-20 15:14:39,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:39,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:39,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:39,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:39,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 182 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:39,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:40,245 INFO L124 PetriNetUnfolderBase]: 2355/4146 cut-off events. [2024-06-20 15:14:40,245 INFO L125 PetriNetUnfolderBase]: For 228684/228696 co-relation queries the response was YES. [2024-06-20 15:14:40,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 4146 events. 2355/4146 cut-off events. For 228684/228696 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27892 event pairs, 907 based on Foata normal form. 13/4153 useless extension candidates. Maximal degree in co-relation 25238. Up to 3605 conditions per place. [2024-06-20 15:14:40,281 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 138 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-20 15:14:40,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 220 transitions, 2810 flow [2024-06-20 15:14:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-20 15:14:40,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578088578088578 [2024-06-20 15:14:40,282 INFO L175 Difference]: Start difference. First operand has 193 places, 182 transitions, 2060 flow. Second operand 11 states and 248 transitions. [2024-06-20 15:14:40,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 220 transitions, 2810 flow [2024-06-20 15:14:40,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 220 transitions, 2769 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:40,630 INFO L231 Difference]: Finished difference. Result has 200 places, 185 transitions, 2205 flow [2024-06-20 15:14:40,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2205, PETRI_PLACES=200, PETRI_TRANSITIONS=185} [2024-06-20 15:14:40,631 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-20 15:14:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 185 transitions, 2205 flow [2024-06-20 15:14:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:40,632 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:40,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 864018936, now seen corresponding path program 2 times [2024-06-20 15:14:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505378678] [2024-06-20 15:14:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:40,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505378678] [2024-06-20 15:14:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505378678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:40,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102923155] [2024-06-20 15:14:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:40,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:40,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 185 transitions, 2205 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:40,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:41,308 INFO L124 PetriNetUnfolderBase]: 2352/4142 cut-off events. [2024-06-20 15:14:41,308 INFO L125 PetriNetUnfolderBase]: For 235583/235595 co-relation queries the response was YES. [2024-06-20 15:14:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4142 events. 2352/4142 cut-off events. For 235583/235595 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27879 event pairs, 907 based on Foata normal form. 13/4149 useless extension candidates. Maximal degree in co-relation 25430. Up to 3602 conditions per place. [2024-06-20 15:14:41,339 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 75 changer transitions 0/219 dead transitions. [2024-06-20 15:14:41,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 219 transitions, 2819 flow [2024-06-20 15:14:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-20 15:14:41,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-20 15:14:41,342 INFO L175 Difference]: Start difference. First operand has 200 places, 185 transitions, 2205 flow. Second operand 11 states and 247 transitions. [2024-06-20 15:14:41,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 219 transitions, 2819 flow [2024-06-20 15:14:41,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 219 transitions, 2623 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:41,709 INFO L231 Difference]: Finished difference. Result has 202 places, 185 transitions, 2167 flow [2024-06-20 15:14:41,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2167, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2024-06-20 15:14:41,709 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 162 predicate places. [2024-06-20 15:14:41,709 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 2167 flow [2024-06-20 15:14:41,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:41,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:41,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:41,710 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:41,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1384157238, now seen corresponding path program 3 times [2024-06-20 15:14:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:41,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002343460] [2024-06-20 15:14:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:41,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:41,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:41,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002343460] [2024-06-20 15:14:41,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002343460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:41,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:41,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:41,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346963012] [2024-06-20 15:14:41,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:41,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:41,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:41,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 2167 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:41,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:41,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:42,322 INFO L124 PetriNetUnfolderBase]: 2357/4155 cut-off events. [2024-06-20 15:14:42,322 INFO L125 PetriNetUnfolderBase]: For 235587/235595 co-relation queries the response was YES. [2024-06-20 15:14:42,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25549 conditions, 4155 events. 2357/4155 cut-off events. For 235587/235595 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28018 event pairs, 910 based on Foata normal form. 9/4162 useless extension candidates. Maximal degree in co-relation 25450. Up to 3608 conditions per place. [2024-06-20 15:14:42,358 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 121 selfloop transitions, 82 changer transitions 0/210 dead transitions. [2024-06-20 15:14:42,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 210 transitions, 2766 flow [2024-06-20 15:14:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-20 15:14:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2024-06-20 15:14:42,359 INFO L175 Difference]: Start difference. First operand has 202 places, 185 transitions, 2167 flow. Second operand 11 states and 237 transitions. [2024-06-20 15:14:42,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 210 transitions, 2766 flow [2024-06-20 15:14:42,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 210 transitions, 2606 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:42,731 INFO L231 Difference]: Finished difference. Result has 203 places, 188 transitions, 2214 flow [2024-06-20 15:14:42,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2214, PETRI_PLACES=203, PETRI_TRANSITIONS=188} [2024-06-20 15:14:42,732 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 163 predicate places. [2024-06-20 15:14:42,732 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 188 transitions, 2214 flow [2024-06-20 15:14:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:42,733 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:42,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash 489989300, now seen corresponding path program 4 times [2024-06-20 15:14:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:42,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200384114] [2024-06-20 15:14:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:42,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:42,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200384114] [2024-06-20 15:14:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200384114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:42,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:42,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:42,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139372757] [2024-06-20 15:14:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:42,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:42,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:42,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:42,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 188 transitions, 2214 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:42,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:42,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:43,345 INFO L124 PetriNetUnfolderBase]: 2354/4151 cut-off events. [2024-06-20 15:14:43,346 INFO L125 PetriNetUnfolderBase]: For 234225/234233 co-relation queries the response was YES. [2024-06-20 15:14:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25477 conditions, 4151 events. 2354/4151 cut-off events. For 234225/234233 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27975 event pairs, 910 based on Foata normal form. 9/4158 useless extension candidates. Maximal degree in co-relation 25377. Up to 3605 conditions per place. [2024-06-20 15:14:43,381 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 82 changer transitions 0/209 dead transitions. [2024-06-20 15:14:43,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 209 transitions, 2668 flow [2024-06-20 15:14:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-20 15:14:43,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501165501165501 [2024-06-20 15:14:43,382 INFO L175 Difference]: Start difference. First operand has 203 places, 188 transitions, 2214 flow. Second operand 11 states and 236 transitions. [2024-06-20 15:14:43,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 209 transitions, 2668 flow [2024-06-20 15:14:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 209 transitions, 2480 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:43,782 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2196 flow [2024-06-20 15:14:43,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2196, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-20 15:14:43,782 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-20 15:14:43,782 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2196 flow [2024-06-20 15:14:43,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:43,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:43,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:43,783 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:43,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2100628056, now seen corresponding path program 5 times [2024-06-20 15:14:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639729182] [2024-06-20 15:14:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:43,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:43,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:43,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639729182] [2024-06-20 15:14:43,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639729182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:43,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:43,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:43,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506448227] [2024-06-20 15:14:43,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:43,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:43,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:43,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2196 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:43,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:43,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:44,387 INFO L124 PetriNetUnfolderBase]: 2351/4144 cut-off events. [2024-06-20 15:14:44,387 INFO L125 PetriNetUnfolderBase]: For 240921/240923 co-relation queries the response was YES. [2024-06-20 15:14:44,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4144 events. 2351/4144 cut-off events. For 240921/240923 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27945 event pairs, 941 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 25427. Up to 3565 conditions per place. [2024-06-20 15:14:44,421 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 105 selfloop transitions, 90 changer transitions 0/202 dead transitions. [2024-06-20 15:14:44,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 202 transitions, 2618 flow [2024-06-20 15:14:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-20 15:14:44,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541025641025641 [2024-06-20 15:14:44,422 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2196 flow. Second operand 10 states and 211 transitions. [2024-06-20 15:14:44,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 202 transitions, 2618 flow [2024-06-20 15:14:44,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 202 transitions, 2454 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:44,899 INFO L231 Difference]: Finished difference. Result has 205 places, 188 transitions, 2218 flow [2024-06-20 15:14:44,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2218, PETRI_PLACES=205, PETRI_TRANSITIONS=188} [2024-06-20 15:14:44,900 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-20 15:14:44,900 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 188 transitions, 2218 flow [2024-06-20 15:14:44,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:44,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:44,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:44,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:44,900 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:44,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1197821225, now seen corresponding path program 1 times [2024-06-20 15:14:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:44,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398606849] [2024-06-20 15:14:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:44,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:44,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398606849] [2024-06-20 15:14:44,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398606849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:44,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:44,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281044496] [2024-06-20 15:14:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:44,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:45,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:45,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 188 transitions, 2218 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:45,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:45,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:45,560 INFO L124 PetriNetUnfolderBase]: 2338/4121 cut-off events. [2024-06-20 15:14:45,560 INFO L125 PetriNetUnfolderBase]: For 256659/256671 co-relation queries the response was YES. [2024-06-20 15:14:45,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24696 conditions, 4121 events. 2338/4121 cut-off events. For 256659/256671 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27589 event pairs, 731 based on Foata normal form. 36/4156 useless extension candidates. Maximal degree in co-relation 24594. Up to 1560 conditions per place. [2024-06-20 15:14:45,598 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 161 selfloop transitions, 57 changer transitions 14/239 dead transitions. [2024-06-20 15:14:45,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 239 transitions, 3112 flow [2024-06-20 15:14:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 15:14:45,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6381766381766382 [2024-06-20 15:14:45,599 INFO L175 Difference]: Start difference. First operand has 205 places, 188 transitions, 2218 flow. Second operand 9 states and 224 transitions. [2024-06-20 15:14:45,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 239 transitions, 3112 flow [2024-06-20 15:14:45,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 239 transitions, 2869 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:45,990 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2056 flow [2024-06-20 15:14:45,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-20 15:14:45,990 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-20 15:14:45,990 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2056 flow [2024-06-20 15:14:45,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:45,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:45,991 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:45,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1442184741, now seen corresponding path program 2 times [2024-06-20 15:14:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789461493] [2024-06-20 15:14:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:46,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789461493] [2024-06-20 15:14:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789461493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:46,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:46,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392232679] [2024-06-20 15:14:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:46,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:46,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2056 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:46,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:46,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:46,637 INFO L124 PetriNetUnfolderBase]: 2516/4353 cut-off events. [2024-06-20 15:14:46,638 INFO L125 PetriNetUnfolderBase]: For 333121/333133 co-relation queries the response was YES. [2024-06-20 15:14:46,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29230 conditions, 4353 events. 2516/4353 cut-off events. For 333121/333133 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29006 event pairs, 785 based on Foata normal form. 18/4370 useless extension candidates. Maximal degree in co-relation 29128. Up to 1768 conditions per place. [2024-06-20 15:14:46,676 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 152 selfloop transitions, 62 changer transitions 11/232 dead transitions. [2024-06-20 15:14:46,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 232 transitions, 2948 flow [2024-06-20 15:14:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:14:46,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-20 15:14:46,677 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2056 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:14:46,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 232 transitions, 2948 flow [2024-06-20 15:14:47,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 232 transitions, 2817 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:47,010 INFO L231 Difference]: Finished difference. Result has 205 places, 183 transitions, 2066 flow [2024-06-20 15:14:47,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2066, PETRI_PLACES=205, PETRI_TRANSITIONS=183} [2024-06-20 15:14:47,019 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2024-06-20 15:14:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 183 transitions, 2066 flow [2024-06-20 15:14:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:47,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:47,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:47,020 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:47,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1389806211, now seen corresponding path program 3 times [2024-06-20 15:14:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353371748] [2024-06-20 15:14:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:47,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:47,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353371748] [2024-06-20 15:14:47,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353371748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:47,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:47,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684101853] [2024-06-20 15:14:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:47,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:47,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:47,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:47,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:47,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 183 transitions, 2066 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:47,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:47,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:47,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:47,686 INFO L124 PetriNetUnfolderBase]: 2399/4179 cut-off events. [2024-06-20 15:14:47,687 INFO L125 PetriNetUnfolderBase]: For 312938/312950 co-relation queries the response was YES. [2024-06-20 15:14:47,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26723 conditions, 4179 events. 2399/4179 cut-off events. For 312938/312950 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28008 event pairs, 870 based on Foata normal form. 42/4220 useless extension candidates. Maximal degree in co-relation 26621. Up to 2889 conditions per place. [2024-06-20 15:14:47,724 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 150 selfloop transitions, 53 changer transitions 18/228 dead transitions. [2024-06-20 15:14:47,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 228 transitions, 2784 flow [2024-06-20 15:14:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-20 15:14:47,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-20 15:14:47,725 INFO L175 Difference]: Start difference. First operand has 205 places, 183 transitions, 2066 flow. Second operand 10 states and 237 transitions. [2024-06-20 15:14:47,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 228 transitions, 2784 flow [2024-06-20 15:14:48,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 228 transitions, 2653 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:48,207 INFO L231 Difference]: Finished difference. Result has 203 places, 175 transitions, 1958 flow [2024-06-20 15:14:48,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1958, PETRI_PLACES=203, PETRI_TRANSITIONS=175} [2024-06-20 15:14:48,207 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 163 predicate places. [2024-06-20 15:14:48,207 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 175 transitions, 1958 flow [2024-06-20 15:14:48,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:48,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:48,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:48,208 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:48,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1306210779, now seen corresponding path program 4 times [2024-06-20 15:14:48,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:48,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164952586] [2024-06-20 15:14:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:48,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164952586] [2024-06-20 15:14:48,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164952586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:48,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734618743] [2024-06-20 15:14:48,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:48,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:48,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 175 transitions, 1958 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:48,801 INFO L124 PetriNetUnfolderBase]: 2157/3760 cut-off events. [2024-06-20 15:14:48,801 INFO L125 PetriNetUnfolderBase]: For 268674/268686 co-relation queries the response was YES. [2024-06-20 15:14:48,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23535 conditions, 3760 events. 2157/3760 cut-off events. For 268674/268686 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24755 event pairs, 804 based on Foata normal form. 46/3805 useless extension candidates. Maximal degree in co-relation 23435. Up to 3145 conditions per place. [2024-06-20 15:14:48,835 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 47 changer transitions 23/211 dead transitions. [2024-06-20 15:14:48,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 211 transitions, 2496 flow [2024-06-20 15:14:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-20 15:14:48,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-20 15:14:48,836 INFO L175 Difference]: Start difference. First operand has 203 places, 175 transitions, 1958 flow. Second operand 10 states and 226 transitions. [2024-06-20 15:14:48,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 211 transitions, 2496 flow [2024-06-20 15:14:49,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 211 transitions, 2383 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:49,213 INFO L231 Difference]: Finished difference. Result has 200 places, 168 transitions, 1876 flow [2024-06-20 15:14:49,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1876, PETRI_PLACES=200, PETRI_TRANSITIONS=168} [2024-06-20 15:14:49,214 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-20 15:14:49,214 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 168 transitions, 1876 flow [2024-06-20 15:14:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:49,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:49,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:49,215 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:49,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1792646693, now seen corresponding path program 5 times [2024-06-20 15:14:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061657637] [2024-06-20 15:14:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:49,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061657637] [2024-06-20 15:14:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061657637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:49,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776807318] [2024-06-20 15:14:49,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:49,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:49,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:49,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:49,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 168 transitions, 1876 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:49,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:49,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:49,758 INFO L124 PetriNetUnfolderBase]: 2061/3589 cut-off events. [2024-06-20 15:14:49,758 INFO L125 PetriNetUnfolderBase]: For 213872/213883 co-relation queries the response was YES. [2024-06-20 15:14:49,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22505 conditions, 3589 events. 2061/3589 cut-off events. For 213872/213883 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23362 event pairs, 768 based on Foata normal form. 19/3607 useless extension candidates. Maximal degree in co-relation 22407. Up to 3141 conditions per place. [2024-06-20 15:14:49,789 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 133 selfloop transitions, 45 changer transitions 10/195 dead transitions. [2024-06-20 15:14:49,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 195 transitions, 2348 flow [2024-06-20 15:14:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 15:14:49,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698005698005698 [2024-06-20 15:14:49,795 INFO L175 Difference]: Start difference. First operand has 200 places, 168 transitions, 1876 flow. Second operand 9 states and 200 transitions. [2024-06-20 15:14:49,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 195 transitions, 2348 flow [2024-06-20 15:14:50,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 195 transitions, 2242 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:50,079 INFO L231 Difference]: Finished difference. Result has 193 places, 165 transitions, 1832 flow [2024-06-20 15:14:50,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1832, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2024-06-20 15:14:50,080 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2024-06-20 15:14:50,080 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 1832 flow [2024-06-20 15:14:50,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:50,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:50,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:50,080 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:50,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1795503653, now seen corresponding path program 6 times [2024-06-20 15:14:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:50,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996118713] [2024-06-20 15:14:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:50,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996118713] [2024-06-20 15:14:50,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996118713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:50,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:50,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:50,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837689904] [2024-06-20 15:14:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:50,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:50,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:50,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 1832 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:50,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:50,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:50,652 INFO L124 PetriNetUnfolderBase]: 2229/3856 cut-off events. [2024-06-20 15:14:50,652 INFO L125 PetriNetUnfolderBase]: For 233805/233816 co-relation queries the response was YES. [2024-06-20 15:14:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24821 conditions, 3856 events. 2229/3856 cut-off events. For 233805/233816 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25361 event pairs, 840 based on Foata normal form. 19/3874 useless extension candidates. Maximal degree in co-relation 24726. Up to 3107 conditions per place. [2024-06-20 15:14:50,683 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 42 changer transitions 14/200 dead transitions. [2024-06-20 15:14:50,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 200 transitions, 2470 flow [2024-06-20 15:14:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:14:50,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868945868945868 [2024-06-20 15:14:50,684 INFO L175 Difference]: Start difference. First operand has 193 places, 165 transitions, 1832 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:14:50,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 200 transitions, 2470 flow [2024-06-20 15:14:50,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 200 transitions, 2370 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:50,987 INFO L231 Difference]: Finished difference. Result has 192 places, 161 transitions, 1770 flow [2024-06-20 15:14:50,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=192, PETRI_TRANSITIONS=161} [2024-06-20 15:14:50,988 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-20 15:14:50,988 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 161 transitions, 1770 flow [2024-06-20 15:14:50,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:50,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:50,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:14:50,989 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:50,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash 56658365, now seen corresponding path program 7 times [2024-06-20 15:14:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624412744] [2024-06-20 15:14:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:51,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:51,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624412744] [2024-06-20 15:14:51,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624412744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:51,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:51,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900859744] [2024-06-20 15:14:51,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:51,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:51,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 161 transitions, 1770 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:51,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:51,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:51,530 INFO L124 PetriNetUnfolderBase]: 2102/3652 cut-off events. [2024-06-20 15:14:51,530 INFO L125 PetriNetUnfolderBase]: For 215590/215604 co-relation queries the response was YES. [2024-06-20 15:14:51,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22340 conditions, 3652 events. 2102/3652 cut-off events. For 215590/215604 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24048 event pairs, 686 based on Foata normal form. 34/3685 useless extension candidates. Maximal degree in co-relation 22245. Up to 2035 conditions per place. [2024-06-20 15:14:51,559 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 131 selfloop transitions, 32 changer transitions 21/191 dead transitions. [2024-06-20 15:14:51,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 191 transitions, 2362 flow [2024-06-20 15:14:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:14:51,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-20 15:14:51,560 INFO L175 Difference]: Start difference. First operand has 192 places, 161 transitions, 1770 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:14:51,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 191 transitions, 2362 flow [2024-06-20 15:14:51,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 191 transitions, 2256 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:51,750 INFO L231 Difference]: Finished difference. Result has 187 places, 150 transitions, 1606 flow [2024-06-20 15:14:51,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1606, PETRI_PLACES=187, PETRI_TRANSITIONS=150} [2024-06-20 15:14:51,750 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-20 15:14:51,751 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 150 transitions, 1606 flow [2024-06-20 15:14:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:51,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:14:51,751 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:51,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 234153143, now seen corresponding path program 1 times [2024-06-20 15:14:51,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:51,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662839592] [2024-06-20 15:14:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662839592] [2024-06-20 15:14:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662839592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:51,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264906894] [2024-06-20 15:14:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:51,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:51,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 150 transitions, 1606 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:51,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:52,220 INFO L124 PetriNetUnfolderBase]: 1868/3254 cut-off events. [2024-06-20 15:14:52,220 INFO L125 PetriNetUnfolderBase]: For 186164/186168 co-relation queries the response was YES. [2024-06-20 15:14:52,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20834 conditions, 3254 events. 1868/3254 cut-off events. For 186164/186168 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21146 event pairs, 620 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 20740. Up to 2685 conditions per place. [2024-06-20 15:14:52,246 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 132 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-20 15:14:52,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 173 transitions, 2146 flow [2024-06-20 15:14:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:14:52,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-20 15:14:52,247 INFO L175 Difference]: Start difference. First operand has 187 places, 150 transitions, 1606 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:14:52,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 173 transitions, 2146 flow [2024-06-20 15:14:52,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 173 transitions, 2051 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 15:14:52,446 INFO L231 Difference]: Finished difference. Result has 177 places, 152 transitions, 1631 flow [2024-06-20 15:14:52,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=177, PETRI_TRANSITIONS=152} [2024-06-20 15:14:52,446 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 137 predicate places. [2024-06-20 15:14:52,447 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 152 transitions, 1631 flow [2024-06-20 15:14:52,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:52,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:52,447 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] [2024-06-20 15:14:52,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:14:52,447 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:52,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash 65229245, now seen corresponding path program 8 times [2024-06-20 15:14:52,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:52,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751751279] [2024-06-20 15:14:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:52,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:52,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751751279] [2024-06-20 15:14:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751751279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120478561] [2024-06-20 15:14:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:52,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:52,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 152 transitions, 1631 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:52,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:52,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:52,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:52,931 INFO L124 PetriNetUnfolderBase]: 1799/3139 cut-off events. [2024-06-20 15:14:52,931 INFO L125 PetriNetUnfolderBase]: For 158760/158764 co-relation queries the response was YES. [2024-06-20 15:14:52,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18522 conditions, 3139 events. 1799/3139 cut-off events. For 158760/158764 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20176 event pairs, 683 based on Foata normal form. 38/3176 useless extension candidates. Maximal degree in co-relation 18433. Up to 2613 conditions per place. [2024-06-20 15:14:52,955 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 118 selfloop transitions, 26 changer transitions 21/172 dead transitions. [2024-06-20 15:14:52,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 172 transitions, 2037 flow [2024-06-20 15:14:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:14:52,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-20 15:14:52,957 INFO L175 Difference]: Start difference. First operand has 177 places, 152 transitions, 1631 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:14:52,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 172 transitions, 2037 flow [2024-06-20 15:14:53,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 172 transitions, 1987 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:53,159 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1523 flow [2024-06-20 15:14:53,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1523, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-20 15:14:53,159 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-20 15:14:53,159 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1523 flow [2024-06-20 15:14:53,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:53,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:53,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:14:53,160 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:53,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash 352116575, now seen corresponding path program 9 times [2024-06-20 15:14:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:53,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750226294] [2024-06-20 15:14:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750226294] [2024-06-20 15:14:53,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750226294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:53,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:53,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834800536] [2024-06-20 15:14:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:53,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:53,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:53,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:53,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1523 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:53,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:53,592 INFO L124 PetriNetUnfolderBase]: 1578/2746 cut-off events. [2024-06-20 15:14:53,593 INFO L125 PetriNetUnfolderBase]: For 123571/123575 co-relation queries the response was YES. [2024-06-20 15:14:53,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 2746 events. 1578/2746 cut-off events. For 123571/123575 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17069 event pairs, 558 based on Foata normal form. 38/2783 useless extension candidates. Maximal degree in co-relation 15276. Up to 2250 conditions per place. [2024-06-20 15:14:53,615 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 25 changer transitions 7/159 dead transitions. [2024-06-20 15:14:53,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 159 transitions, 1895 flow [2024-06-20 15:14:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 15:14:53,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677655677655677 [2024-06-20 15:14:53,616 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1523 flow. Second operand 7 states and 155 transitions. [2024-06-20 15:14:53,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 159 transitions, 1895 flow [2024-06-20 15:14:53,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 159 transitions, 1817 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 15:14:53,734 INFO L231 Difference]: Finished difference. Result has 170 places, 137 transitions, 1441 flow [2024-06-20 15:14:53,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=170, PETRI_TRANSITIONS=137} [2024-06-20 15:14:53,734 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-20 15:14:53,734 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 137 transitions, 1441 flow [2024-06-20 15:14:53,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:53,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:53,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:14:53,735 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:53,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1206603085, now seen corresponding path program 1 times [2024-06-20 15:14:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171642047] [2024-06-20 15:14:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:53,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171642047] [2024-06-20 15:14:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171642047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:53,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755049117] [2024-06-20 15:14:53,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:53,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:53,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:53,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:53,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 137 transitions, 1441 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:53,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:54,105 INFO L124 PetriNetUnfolderBase]: 1381/2415 cut-off events. [2024-06-20 15:14:54,105 INFO L125 PetriNetUnfolderBase]: For 74635/74639 co-relation queries the response was YES. [2024-06-20 15:14:54,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13388 conditions, 2415 events. 1381/2415 cut-off events. For 74635/74639 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14524 event pairs, 363 based on Foata normal form. 10/2424 useless extension candidates. Maximal degree in co-relation 13304. Up to 1906 conditions per place. [2024-06-20 15:14:54,122 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 119 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2024-06-20 15:14:54,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 157 transitions, 1817 flow [2024-06-20 15:14:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 15:14:54,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068376068376068 [2024-06-20 15:14:54,123 INFO L175 Difference]: Start difference. First operand has 170 places, 137 transitions, 1441 flow. Second operand 6 states and 142 transitions. [2024-06-20 15:14:54,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 157 transitions, 1817 flow [2024-06-20 15:14:54,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 157 transitions, 1733 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:14:54,235 INFO L231 Difference]: Finished difference. Result has 163 places, 137 transitions, 1425 flow [2024-06-20 15:14:54,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1425, PETRI_PLACES=163, PETRI_TRANSITIONS=137} [2024-06-20 15:14:54,235 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-20 15:14:54,235 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 137 transitions, 1425 flow [2024-06-20 15:14:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:54,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:54,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:14:54,236 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:54,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 352485537, now seen corresponding path program 1 times [2024-06-20 15:14:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613626342] [2024-06-20 15:14:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:54,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613626342] [2024-06-20 15:14:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613626342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:54,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:54,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717807749] [2024-06-20 15:14:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:54,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:54,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:54,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:54,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 137 transitions, 1425 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:54,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:54,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:54,681 INFO L124 PetriNetUnfolderBase]: 1485/2607 cut-off events. [2024-06-20 15:14:54,681 INFO L125 PetriNetUnfolderBase]: For 91222/91226 co-relation queries the response was YES. [2024-06-20 15:14:54,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 2607 events. 1485/2607 cut-off events. For 91222/91226 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16099 event pairs, 379 based on Foata normal form. 34/2640 useless extension candidates. Maximal degree in co-relation 14044. Up to 2003 conditions per place. [2024-06-20 15:14:54,699 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 32 changer transitions 5/166 dead transitions. [2024-06-20 15:14:54,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 166 transitions, 1936 flow [2024-06-20 15:14:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 15:14:54,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-20 15:14:54,708 INFO L175 Difference]: Start difference. First operand has 163 places, 137 transitions, 1425 flow. Second operand 8 states and 179 transitions. [2024-06-20 15:14:54,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 166 transitions, 1936 flow [2024-06-20 15:14:54,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 166 transitions, 1839 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:54,811 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1479 flow [2024-06-20 15:14:54,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-20 15:14:54,812 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-20 15:14:54,812 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1479 flow [2024-06-20 15:14:54,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:54,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:54,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:14:54,812 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:54,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash -964200035, now seen corresponding path program 2 times [2024-06-20 15:14:54,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:54,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99015671] [2024-06-20 15:14:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:54,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:54,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99015671] [2024-06-20 15:14:54,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99015671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:54,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:54,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863702560] [2024-06-20 15:14:54,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:54,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:54,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:54,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:54,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:55,172 INFO L124 PetriNetUnfolderBase]: 1344/2312 cut-off events. [2024-06-20 15:14:55,172 INFO L125 PetriNetUnfolderBase]: For 67314/67316 co-relation queries the response was YES. [2024-06-20 15:14:55,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2312 events. 1344/2312 cut-off events. For 67314/67316 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13521 event pairs, 415 based on Foata normal form. 10/2321 useless extension candidates. Maximal degree in co-relation 12678. Up to 1938 conditions per place. [2024-06-20 15:14:55,187 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 22 changer transitions 9/161 dead transitions. [2024-06-20 15:14:55,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 1951 flow [2024-06-20 15:14:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 15:14:55,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-20 15:14:55,188 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1479 flow. Second operand 8 states and 173 transitions. [2024-06-20 15:14:55,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 1951 flow [2024-06-20 15:14:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 161 transitions, 1866 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:55,293 INFO L231 Difference]: Finished difference. Result has 167 places, 136 transitions, 1392 flow [2024-06-20 15:14:55,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=167, PETRI_TRANSITIONS=136} [2024-06-20 15:14:55,293 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-20 15:14:55,293 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 136 transitions, 1392 flow [2024-06-20 15:14:55,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:55,294 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] [2024-06-20 15:14:55,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:14:55,294 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:55,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash -971818595, now seen corresponding path program 3 times [2024-06-20 15:14:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:55,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162602636] [2024-06-20 15:14:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:55,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:55,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:55,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162602636] [2024-06-20 15:14:55,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162602636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:55,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184528244] [2024-06-20 15:14:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:55,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:55,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:55,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 136 transitions, 1392 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:55,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:55,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:55,634 INFO L124 PetriNetUnfolderBase]: 1176/2026 cut-off events. [2024-06-20 15:14:55,634 INFO L125 PetriNetUnfolderBase]: For 59194/59196 co-relation queries the response was YES. [2024-06-20 15:14:55,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11019 conditions, 2026 events. 1176/2026 cut-off events. For 59194/59196 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11478 event pairs, 349 based on Foata normal form. 10/2035 useless extension candidates. Maximal degree in co-relation 10938. Up to 1752 conditions per place. [2024-06-20 15:14:55,647 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 18 changer transitions 12/152 dead transitions. [2024-06-20 15:14:55,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 152 transitions, 1738 flow [2024-06-20 15:14:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 15:14:55,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-20 15:14:55,648 INFO L175 Difference]: Start difference. First operand has 167 places, 136 transitions, 1392 flow. Second operand 8 states and 166 transitions. [2024-06-20 15:14:55,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 152 transitions, 1738 flow [2024-06-20 15:14:55,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 152 transitions, 1674 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 15:14:55,725 INFO L231 Difference]: Finished difference. Result has 159 places, 131 transitions, 1315 flow [2024-06-20 15:14:55,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=159, PETRI_TRANSITIONS=131} [2024-06-20 15:14:55,726 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-20 15:14:55,726 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 131 transitions, 1315 flow [2024-06-20 15:14:55,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:55,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:55,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:14:55,726 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:55,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash -151962669, now seen corresponding path program 4 times [2024-06-20 15:14:55,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:55,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762087069] [2024-06-20 15:14:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:55,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:55,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:55,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762087069] [2024-06-20 15:14:55,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762087069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:55,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:55,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:55,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783200452] [2024-06-20 15:14:55,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:55,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:55,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:55,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 131 transitions, 1315 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:55,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:55,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:56,116 INFO L124 PetriNetUnfolderBase]: 1094/1882 cut-off events. [2024-06-20 15:14:56,116 INFO L125 PetriNetUnfolderBase]: For 52306/52308 co-relation queries the response was YES. [2024-06-20 15:14:56,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 1882 events. 1094/1882 cut-off events. For 52306/52308 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10464 event pairs, 245 based on Foata normal form. 8/1889 useless extension candidates. Maximal degree in co-relation 10274. Up to 1556 conditions per place. [2024-06-20 15:14:56,131 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 115 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-20 15:14:56,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 152 transitions, 1705 flow [2024-06-20 15:14:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 15:14:56,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-20 15:14:56,133 INFO L175 Difference]: Start difference. First operand has 159 places, 131 transitions, 1315 flow. Second operand 8 states and 173 transitions. [2024-06-20 15:14:56,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 152 transitions, 1705 flow [2024-06-20 15:14:56,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 152 transitions, 1624 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-20 15:14:56,190 INFO L231 Difference]: Finished difference. Result has 148 places, 132 transitions, 1332 flow [2024-06-20 15:14:56,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=148, PETRI_TRANSITIONS=132} [2024-06-20 15:14:56,190 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2024-06-20 15:14:56,190 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 132 transitions, 1332 flow [2024-06-20 15:14:56,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:56,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:56,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:14:56,191 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:56,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -152082639, now seen corresponding path program 5 times [2024-06-20 15:14:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755081191] [2024-06-20 15:14:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:56,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755081191] [2024-06-20 15:14:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755081191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:56,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:56,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093979428] [2024-06-20 15:14:56,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:56,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:56,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 132 transitions, 1332 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:56,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:56,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:56,531 INFO L124 PetriNetUnfolderBase]: 1114/1914 cut-off events. [2024-06-20 15:14:56,531 INFO L125 PetriNetUnfolderBase]: For 42566/42568 co-relation queries the response was YES. [2024-06-20 15:14:56,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10046 conditions, 1914 events. 1114/1914 cut-off events. For 42566/42568 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10679 event pairs, 248 based on Foata normal form. 8/1921 useless extension candidates. Maximal degree in co-relation 9975. Up to 1508 conditions per place. [2024-06-20 15:14:56,543 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 116 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-20 15:14:56,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1730 flow [2024-06-20 15:14:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-20 15:14:56,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-20 15:14:56,544 INFO L175 Difference]: Start difference. First operand has 148 places, 132 transitions, 1332 flow. Second operand 8 states and 174 transitions. [2024-06-20 15:14:56,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1730 flow [2024-06-20 15:14:56,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 155 transitions, 1622 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:56,592 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1316 flow [2024-06-20 15:14:56,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1316, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-20 15:14:56,592 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-20 15:14:56,592 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1316 flow [2024-06-20 15:14:56,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:56,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:56,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:14:56,593 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:56,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1011934327, now seen corresponding path program 2 times [2024-06-20 15:14:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:56,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809212813] [2024-06-20 15:14:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:56,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809212813] [2024-06-20 15:14:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809212813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:56,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:56,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038644710] [2024-06-20 15:14:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:56,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:56,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:56,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1316 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:56,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:56,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:56,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:56,939 INFO L124 PetriNetUnfolderBase]: 1134/1940 cut-off events. [2024-06-20 15:14:56,940 INFO L125 PetriNetUnfolderBase]: For 44816/44818 co-relation queries the response was YES. [2024-06-20 15:14:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10182 conditions, 1940 events. 1134/1940 cut-off events. For 44816/44818 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10855 event pairs, 330 based on Foata normal form. 8/1937 useless extension candidates. Maximal degree in co-relation 10111. Up to 1598 conditions per place. [2024-06-20 15:14:56,952 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-20 15:14:56,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 1794 flow [2024-06-20 15:14:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:14:56,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-20 15:14:56,953 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1316 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:14:56,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 1794 flow [2024-06-20 15:14:57,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 160 transitions, 1714 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:57,008 INFO L231 Difference]: Finished difference. Result has 151 places, 134 transitions, 1324 flow [2024-06-20 15:14:57,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=151, PETRI_TRANSITIONS=134} [2024-06-20 15:14:57,009 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-06-20 15:14:57,009 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 134 transitions, 1324 flow [2024-06-20 15:14:57,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:57,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:57,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:14:57,009 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:57,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:57,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563645, now seen corresponding path program 3 times [2024-06-20 15:14:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:57,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907417370] [2024-06-20 15:14:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:57,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:57,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907417370] [2024-06-20 15:14:57,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907417370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:57,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:57,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409646230] [2024-06-20 15:14:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:57,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:57,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:57,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 134 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:57,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:57,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:57,341 INFO L124 PetriNetUnfolderBase]: 1116/1927 cut-off events. [2024-06-20 15:14:57,341 INFO L125 PetriNetUnfolderBase]: For 42785/42787 co-relation queries the response was YES. [2024-06-20 15:14:57,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9754 conditions, 1927 events. 1116/1927 cut-off events. For 42785/42787 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10839 event pairs, 341 based on Foata normal form. 10/1931 useless extension candidates. Maximal degree in co-relation 9682. Up to 1632 conditions per place. [2024-06-20 15:14:57,354 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-20 15:14:57,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 152 transitions, 1672 flow [2024-06-20 15:14:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:14:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575091575091575 [2024-06-20 15:14:57,355 INFO L175 Difference]: Start difference. First operand has 151 places, 134 transitions, 1324 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:14:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 152 transitions, 1672 flow [2024-06-20 15:14:57,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 152 transitions, 1592 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:57,402 INFO L231 Difference]: Finished difference. Result has 153 places, 134 transitions, 1305 flow [2024-06-20 15:14:57,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=153, PETRI_TRANSITIONS=134} [2024-06-20 15:14:57,402 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-20 15:14:57,403 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 134 transitions, 1305 flow [2024-06-20 15:14:57,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:57,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:57,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:14:57,403 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:57,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash 658615415, now seen corresponding path program 4 times [2024-06-20 15:14:57,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:57,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797383442] [2024-06-20 15:14:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:57,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:57,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:57,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797383442] [2024-06-20 15:14:57,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797383442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:57,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:57,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:57,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56848278] [2024-06-20 15:14:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:57,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:57,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:57,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:57,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 134 transitions, 1305 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:57,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:57,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:57,750 INFO L124 PetriNetUnfolderBase]: 1136/1962 cut-off events. [2024-06-20 15:14:57,750 INFO L125 PetriNetUnfolderBase]: For 42947/42949 co-relation queries the response was YES. [2024-06-20 15:14:57,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9835 conditions, 1962 events. 1136/1962 cut-off events. For 42947/42949 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11062 event pairs, 248 based on Foata normal form. 8/1963 useless extension candidates. Maximal degree in co-relation 9762. Up to 1545 conditions per place. [2024-06-20 15:14:57,765 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 118 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-20 15:14:57,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 161 transitions, 1791 flow [2024-06-20 15:14:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:14:57,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-20 15:14:57,766 INFO L175 Difference]: Start difference. First operand has 153 places, 134 transitions, 1305 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:14:57,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 161 transitions, 1791 flow [2024-06-20 15:14:57,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 161 transitions, 1708 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:57,822 INFO L231 Difference]: Finished difference. Result has 153 places, 135 transitions, 1322 flow [2024-06-20 15:14:57,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=153, PETRI_TRANSITIONS=135} [2024-06-20 15:14:57,823 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 113 predicate places. [2024-06-20 15:14:57,823 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 135 transitions, 1322 flow [2024-06-20 15:14:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:57,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:57,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:14:57,823 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:57,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash 670043255, now seen corresponding path program 5 times [2024-06-20 15:14:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:57,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613389806] [2024-06-20 15:14:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:57,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:57,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:57,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613389806] [2024-06-20 15:14:57,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613389806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:57,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:57,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:57,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347318988] [2024-06-20 15:14:57,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:57,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:57,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:57,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:57,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 135 transitions, 1322 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:57,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:57,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:58,118 INFO L124 PetriNetUnfolderBase]: 1143/1973 cut-off events. [2024-06-20 15:14:58,119 INFO L125 PetriNetUnfolderBase]: For 44252/44252 co-relation queries the response was YES. [2024-06-20 15:14:58,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9972 conditions, 1973 events. 1143/1973 cut-off events. For 44252/44252 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11147 event pairs, 210 based on Foata normal form. 6/1972 useless extension candidates. Maximal degree in co-relation 9898. Up to 1125 conditions per place. [2024-06-20 15:14:58,133 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 106 selfloop transitions, 44 changer transitions 0/157 dead transitions. [2024-06-20 15:14:58,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 157 transitions, 1798 flow [2024-06-20 15:14:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:14:58,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-20 15:14:58,134 INFO L175 Difference]: Start difference. First operand has 153 places, 135 transitions, 1322 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:14:58,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 157 transitions, 1798 flow [2024-06-20 15:14:58,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 157 transitions, 1710 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:58,188 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1350 flow [2024-06-20 15:14:58,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1350, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-20 15:14:58,188 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-06-20 15:14:58,188 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1350 flow [2024-06-20 15:14:58,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:58,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:58,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:14:58,189 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:58,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash 40979609, now seen corresponding path program 6 times [2024-06-20 15:14:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:58,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260370466] [2024-06-20 15:14:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:58,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:58,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260370466] [2024-06-20 15:14:58,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260370466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:58,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:58,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639508148] [2024-06-20 15:14:58,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:58,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:58,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:58,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:58,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1350 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:58,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:58,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:58,561 INFO L124 PetriNetUnfolderBase]: 1125/1942 cut-off events. [2024-06-20 15:14:58,561 INFO L125 PetriNetUnfolderBase]: For 41797/41797 co-relation queries the response was YES. [2024-06-20 15:14:58,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 1942 events. 1125/1942 cut-off events. For 41797/41797 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10971 event pairs, 346 based on Foata normal form. 8/1948 useless extension candidates. Maximal degree in co-relation 9557. Up to 1651 conditions per place. [2024-06-20 15:14:58,571 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 110 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-20 15:14:58,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 148 transitions, 1674 flow [2024-06-20 15:14:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-20 15:14:58,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567765567765568 [2024-06-20 15:14:58,572 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1350 flow. Second operand 7 states and 152 transitions. [2024-06-20 15:14:58,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 148 transitions, 1674 flow [2024-06-20 15:14:58,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 1599 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:58,636 INFO L231 Difference]: Finished difference. Result has 158 places, 136 transitions, 1342 flow [2024-06-20 15:14:58,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=158, PETRI_TRANSITIONS=136} [2024-06-20 15:14:58,637 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 118 predicate places. [2024-06-20 15:14:58,637 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 136 transitions, 1342 flow [2024-06-20 15:14:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:58,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:14:58,637 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:58,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1522335277, now seen corresponding path program 6 times [2024-06-20 15:14:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330769098] [2024-06-20 15:14:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:58,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:58,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330769098] [2024-06-20 15:14:58,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330769098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:58,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:58,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:58,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261749034] [2024-06-20 15:14:58,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:58,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:58,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:58,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 136 transitions, 1342 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:58,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:58,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:59,004 INFO L124 PetriNetUnfolderBase]: 1229/2117 cut-off events. [2024-06-20 15:14:59,005 INFO L125 PetriNetUnfolderBase]: For 64431/64431 co-relation queries the response was YES. [2024-06-20 15:14:59,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10163 conditions, 2117 events. 1229/2117 cut-off events. For 64431/64431 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12239 event pairs, 389 based on Foata normal form. 34/2149 useless extension candidates. Maximal degree in co-relation 10087. Up to 1627 conditions per place. [2024-06-20 15:14:59,019 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 53 changer transitions 3/156 dead transitions. [2024-06-20 15:14:59,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 156 transitions, 1730 flow [2024-06-20 15:14:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 15:14:59,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-20 15:14:59,020 INFO L175 Difference]: Start difference. First operand has 158 places, 136 transitions, 1342 flow. Second operand 9 states and 198 transitions. [2024-06-20 15:14:59,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 156 transitions, 1730 flow [2024-06-20 15:14:59,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 156 transitions, 1655 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:59,082 INFO L231 Difference]: Finished difference. Result has 161 places, 136 transitions, 1400 flow [2024-06-20 15:14:59,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1400, PETRI_PLACES=161, PETRI_TRANSITIONS=136} [2024-06-20 15:14:59,083 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-06-20 15:14:59,083 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 136 transitions, 1400 flow [2024-06-20 15:14:59,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:59,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:59,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:59,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:14:59,083 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:59,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1990008387, now seen corresponding path program 2 times [2024-06-20 15:14:59,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:59,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103305936] [2024-06-20 15:14:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:59,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:59,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103305936] [2024-06-20 15:14:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103305936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:59,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793026258] [2024-06-20 15:14:59,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:59,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:59,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:59,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 136 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:59,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:59,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:59,435 INFO L124 PetriNetUnfolderBase]: 1239/2132 cut-off events. [2024-06-20 15:14:59,436 INFO L125 PetriNetUnfolderBase]: For 45361/45361 co-relation queries the response was YES. [2024-06-20 15:14:59,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10422 conditions, 2132 events. 1239/2132 cut-off events. For 45361/45361 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12264 event pairs, 392 based on Foata normal form. 6/2136 useless extension candidates. Maximal degree in co-relation 10345. Up to 1769 conditions per place. [2024-06-20 15:14:59,451 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 111 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-20 15:14:59,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 153 transitions, 1775 flow [2024-06-20 15:14:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 15:14:59,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-20 15:14:59,452 INFO L175 Difference]: Start difference. First operand has 161 places, 136 transitions, 1400 flow. Second operand 8 states and 173 transitions. [2024-06-20 15:14:59,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 153 transitions, 1775 flow [2024-06-20 15:14:59,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 1655 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:59,521 INFO L231 Difference]: Finished difference. Result has 162 places, 137 transitions, 1381 flow [2024-06-20 15:14:59,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=162, PETRI_TRANSITIONS=137} [2024-06-20 15:14:59,522 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2024-06-20 15:14:59,522 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 137 transitions, 1381 flow [2024-06-20 15:14:59,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:59,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:59,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:14:59,523 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:14:59,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1590511263, now seen corresponding path program 7 times [2024-06-20 15:14:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:59,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128631568] [2024-06-20 15:14:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:59,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:59,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128631568] [2024-06-20 15:14:59,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128631568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:59,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:59,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:59,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615570206] [2024-06-20 15:14:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:59,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:59,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:59,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:14:59,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 137 transitions, 1381 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:59,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:59,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:14:59,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:59,927 INFO L124 PetriNetUnfolderBase]: 1335/2313 cut-off events. [2024-06-20 15:14:59,927 INFO L125 PetriNetUnfolderBase]: For 67621/67621 co-relation queries the response was YES. [2024-06-20 15:14:59,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 2313 events. 1335/2313 cut-off events. For 67621/67621 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13649 event pairs, 395 based on Foata normal form. 30/2341 useless extension candidates. Maximal degree in co-relation 10932. Up to 1595 conditions per place. [2024-06-20 15:14:59,942 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 95 selfloop transitions, 58 changer transitions 6/166 dead transitions. [2024-06-20 15:14:59,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 166 transitions, 1849 flow [2024-06-20 15:14:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 15:14:59,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:14:59,943 INFO L175 Difference]: Start difference. First operand has 162 places, 137 transitions, 1381 flow. Second operand 10 states and 221 transitions. [2024-06-20 15:14:59,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 166 transitions, 1849 flow [2024-06-20 15:15:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 1758 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:00,023 INFO L231 Difference]: Finished difference. Result has 167 places, 139 transitions, 1464 flow [2024-06-20 15:15:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1464, PETRI_PLACES=167, PETRI_TRANSITIONS=139} [2024-06-20 15:15:00,023 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2024-06-20 15:15:00,023 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 139 transitions, 1464 flow [2024-06-20 15:15:00,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:00,023 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] [2024-06-20 15:15:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:15:00,024 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:00,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1763350785, now seen corresponding path program 3 times [2024-06-20 15:15:00,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:00,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501137476] [2024-06-20 15:15:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:00,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501137476] [2024-06-20 15:15:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501137476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:00,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:00,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:15:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440288891] [2024-06-20 15:15:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:00,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:15:00,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:15:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:15:00,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:00,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 139 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:00,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:00,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,328 INFO L124 PetriNetUnfolderBase]: 1325/2293 cut-off events. [2024-06-20 15:15:00,328 INFO L125 PetriNetUnfolderBase]: For 50156/50156 co-relation queries the response was YES. [2024-06-20 15:15:00,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11140 conditions, 2293 events. 1325/2293 cut-off events. For 50156/50156 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13418 event pairs, 261 based on Foata normal form. 6/2292 useless extension candidates. Maximal degree in co-relation 11060. Up to 1415 conditions per place. [2024-06-20 15:15:00,344 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 105 selfloop transitions, 49 changer transitions 0/161 dead transitions. [2024-06-20 15:15:00,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 161 transitions, 1961 flow [2024-06-20 15:15:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:15:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:15:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:15:00,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982905982905983 [2024-06-20 15:15:00,345 INFO L175 Difference]: Start difference. First operand has 167 places, 139 transitions, 1464 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:15:00,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 161 transitions, 1961 flow [2024-06-20 15:15:00,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 161 transitions, 1831 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:00,410 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1465 flow [2024-06-20 15:15:00,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1465, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-20 15:15:00,410 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 125 predicate places. [2024-06-20 15:15:00,411 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1465 flow [2024-06-20 15:15:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:00,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:00,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:15:00,411 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:00,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash 454470939, now seen corresponding path program 4 times [2024-06-20 15:15:00,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:00,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775181610] [2024-06-20 15:15:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:00,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775181610] [2024-06-20 15:15:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775181610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:00,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8144691] [2024-06-20 15:15:00,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:00,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:00,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:00,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:00,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1465 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:00,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:00,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,789 INFO L124 PetriNetUnfolderBase]: 1312/2282 cut-off events. [2024-06-20 15:15:00,789 INFO L125 PetriNetUnfolderBase]: For 44443/44443 co-relation queries the response was YES. [2024-06-20 15:15:00,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10782 conditions, 2282 events. 1312/2282 cut-off events. For 44443/44443 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13400 event pairs, 324 based on Foata normal form. 6/2286 useless extension candidates. Maximal degree in co-relation 10702. Up to 1762 conditions per place. [2024-06-20 15:15:00,804 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 105 selfloop transitions, 47 changer transitions 0/159 dead transitions. [2024-06-20 15:15:00,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 159 transitions, 1849 flow [2024-06-20 15:15:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:15:00,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860805860805861 [2024-06-20 15:15:00,805 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1465 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:15:00,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 159 transitions, 1849 flow [2024-06-20 15:15:00,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 159 transitions, 1639 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:00,886 INFO L231 Difference]: Finished difference. Result has 166 places, 140 transitions, 1353 flow [2024-06-20 15:15:00,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1353, PETRI_PLACES=166, PETRI_TRANSITIONS=140} [2024-06-20 15:15:00,886 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-06-20 15:15:00,886 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 140 transitions, 1353 flow [2024-06-20 15:15:00,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:00,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:00,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:15:00,887 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:00,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1576701693, now seen corresponding path program 8 times [2024-06-20 15:15:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:00,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435532780] [2024-06-20 15:15:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:00,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435532780] [2024-06-20 15:15:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435532780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:00,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177436206] [2024-06-20 15:15:00,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:01,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:01,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 140 transitions, 1353 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:01,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:01,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:01,320 INFO L124 PetriNetUnfolderBase]: 1535/2663 cut-off events. [2024-06-20 15:15:01,320 INFO L125 PetriNetUnfolderBase]: For 92055/92055 co-relation queries the response was YES. [2024-06-20 15:15:01,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12761 conditions, 2663 events. 1535/2663 cut-off events. For 92055/92055 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16144 event pairs, 429 based on Foata normal form. 30/2691 useless extension candidates. Maximal degree in co-relation 12682. Up to 1364 conditions per place. [2024-06-20 15:15:01,335 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 93 selfloop transitions, 65 changer transitions 8/173 dead transitions. [2024-06-20 15:15:01,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 173 transitions, 1945 flow [2024-06-20 15:15:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:15:01,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-20 15:15:01,336 INFO L175 Difference]: Start difference. First operand has 166 places, 140 transitions, 1353 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:15:01,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 173 transitions, 1945 flow [2024-06-20 15:15:01,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 1818 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:01,444 INFO L231 Difference]: Finished difference. Result has 169 places, 141 transitions, 1390 flow [2024-06-20 15:15:01,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1390, PETRI_PLACES=169, PETRI_TRANSITIONS=141} [2024-06-20 15:15:01,444 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-20 15:15:01,444 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 141 transitions, 1390 flow [2024-06-20 15:15:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:01,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:01,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:15:01,444 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:01,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1046672147, now seen corresponding path program 9 times [2024-06-20 15:15:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:01,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606204402] [2024-06-20 15:15:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:01,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:01,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:01,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606204402] [2024-06-20 15:15:01,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606204402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:01,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:01,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:01,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380740069] [2024-06-20 15:15:01,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:01,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:01,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:01,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 141 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:01,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:01,816 INFO L124 PetriNetUnfolderBase]: 1348/2310 cut-off events. [2024-06-20 15:15:01,816 INFO L125 PetriNetUnfolderBase]: For 86167/86167 co-relation queries the response was YES. [2024-06-20 15:15:01,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12557 conditions, 2310 events. 1348/2310 cut-off events. For 86167/86167 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13410 event pairs, 451 based on Foata normal form. 6/2314 useless extension candidates. Maximal degree in co-relation 12477. Up to 1750 conditions per place. [2024-06-20 15:15:01,834 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2024-06-20 15:15:01,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 165 transitions, 2048 flow [2024-06-20 15:15:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:15:01,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-20 15:15:01,834 INFO L175 Difference]: Start difference. First operand has 169 places, 141 transitions, 1390 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:15:01,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 165 transitions, 2048 flow [2024-06-20 15:15:01,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 165 transitions, 1880 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:01,939 INFO L231 Difference]: Finished difference. Result has 170 places, 144 transitions, 1440 flow [2024-06-20 15:15:01,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=170, PETRI_TRANSITIONS=144} [2024-06-20 15:15:01,940 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-06-20 15:15:01,940 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 144 transitions, 1440 flow [2024-06-20 15:15:01,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:01,940 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] [2024-06-20 15:15:01,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:15:01,940 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:01,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2054732605, now seen corresponding path program 10 times [2024-06-20 15:15:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723200434] [2024-06-20 15:15:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723200434] [2024-06-20 15:15:02,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723200434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:02,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:02,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240247588] [2024-06-20 15:15:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:02,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:02,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 144 transitions, 1440 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:02,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:02,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:02,285 INFO L124 PetriNetUnfolderBase]: 1208/2096 cut-off events. [2024-06-20 15:15:02,285 INFO L125 PetriNetUnfolderBase]: For 54207/54207 co-relation queries the response was YES. [2024-06-20 15:15:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10146 conditions, 2096 events. 1208/2096 cut-off events. For 54207/54207 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12086 event pairs, 383 based on Foata normal form. 6/2100 useless extension candidates. Maximal degree in co-relation 10066. Up to 1782 conditions per place. [2024-06-20 15:15:02,299 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 117 selfloop transitions, 34 changer transitions 0/158 dead transitions. [2024-06-20 15:15:02,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 158 transitions, 1780 flow [2024-06-20 15:15:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-20 15:15:02,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-20 15:15:02,300 INFO L175 Difference]: Start difference. First operand has 170 places, 144 transitions, 1440 flow. Second operand 8 states and 170 transitions. [2024-06-20 15:15:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 158 transitions, 1780 flow [2024-06-20 15:15:02,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1631 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:02,386 INFO L231 Difference]: Finished difference. Result has 173 places, 144 transitions, 1363 flow [2024-06-20 15:15:02,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1363, PETRI_PLACES=173, PETRI_TRANSITIONS=144} [2024-06-20 15:15:02,387 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-20 15:15:02,387 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 144 transitions, 1363 flow [2024-06-20 15:15:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:02,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:15:02,387 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:02,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1354210083, now seen corresponding path program 11 times [2024-06-20 15:15:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219765266] [2024-06-20 15:15:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:02,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219765266] [2024-06-20 15:15:02,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219765266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:02,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:02,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144047742] [2024-06-20 15:15:02,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:02,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:02,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:02,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:02,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 144 transitions, 1363 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:02,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:02,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:02,713 INFO L124 PetriNetUnfolderBase]: 1236/2144 cut-off events. [2024-06-20 15:15:02,714 INFO L125 PetriNetUnfolderBase]: For 55882/55882 co-relation queries the response was YES. [2024-06-20 15:15:02,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10166 conditions, 2144 events. 1236/2144 cut-off events. For 55882/55882 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12402 event pairs, 420 based on Foata normal form. 8/2150 useless extension candidates. Maximal degree in co-relation 10086. Up to 1805 conditions per place. [2024-06-20 15:15:02,727 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 52 changer transitions 0/158 dead transitions. [2024-06-20 15:15:02,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 158 transitions, 1737 flow [2024-06-20 15:15:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 15:15:02,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-20 15:15:02,728 INFO L175 Difference]: Start difference. First operand has 173 places, 144 transitions, 1363 flow. Second operand 8 states and 173 transitions. [2024-06-20 15:15:02,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 158 transitions, 1737 flow [2024-06-20 15:15:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 1635 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:02,816 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 1400 flow [2024-06-20 15:15:02,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2024-06-20 15:15:02,816 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-06-20 15:15:02,816 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 1400 flow [2024-06-20 15:15:02,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,816 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] [2024-06-20 15:15:02,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:15:02,816 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:02,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1896028671, now seen corresponding path program 12 times [2024-06-20 15:15:02,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293850356] [2024-06-20 15:15:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:02,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:02,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293850356] [2024-06-20 15:15:02,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293850356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:02,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:02,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130305950] [2024-06-20 15:15:02,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:02,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:02,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:02,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:02,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:02,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:02,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:03,168 INFO L124 PetriNetUnfolderBase]: 1218/2118 cut-off events. [2024-06-20 15:15:03,169 INFO L125 PetriNetUnfolderBase]: For 49578/49578 co-relation queries the response was YES. [2024-06-20 15:15:03,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9641 conditions, 2118 events. 1218/2118 cut-off events. For 49578/49578 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12279 event pairs, 396 based on Foata normal form. 8/2124 useless extension candidates. Maximal degree in co-relation 9561. Up to 1671 conditions per place. [2024-06-20 15:15:03,182 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 101 selfloop transitions, 54 changer transitions 0/162 dead transitions. [2024-06-20 15:15:03,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 162 transitions, 1778 flow [2024-06-20 15:15:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 15:15:03,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-20 15:15:03,183 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 1400 flow. Second operand 8 states and 176 transitions. [2024-06-20 15:15:03,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 162 transitions, 1778 flow [2024-06-20 15:15:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 162 transitions, 1632 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:03,287 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 1366 flow [2024-06-20 15:15:03,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-06-20 15:15:03,287 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-20 15:15:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 1366 flow [2024-06-20 15:15:03,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:03,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:15:03,288 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:03,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -221382683, now seen corresponding path program 13 times [2024-06-20 15:15:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:03,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124588820] [2024-06-20 15:15:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:03,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124588820] [2024-06-20 15:15:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124588820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:03,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:03,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:03,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694837604] [2024-06-20 15:15:03,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:03,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:03,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:03,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:03,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 1366 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:03,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:03,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:03,665 INFO L124 PetriNetUnfolderBase]: 1279/2219 cut-off events. [2024-06-20 15:15:03,665 INFO L125 PetriNetUnfolderBase]: For 53826/53826 co-relation queries the response was YES. [2024-06-20 15:15:03,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10293 conditions, 2219 events. 1279/2219 cut-off events. For 53826/53826 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12915 event pairs, 301 based on Foata normal form. 6/2223 useless extension candidates. Maximal degree in co-relation 10213. Up to 1706 conditions per place. [2024-06-20 15:15:03,679 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 112 selfloop transitions, 53 changer transitions 0/172 dead transitions. [2024-06-20 15:15:03,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 172 transitions, 1938 flow [2024-06-20 15:15:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-20 15:15:03,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:15:03,680 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 1366 flow. Second operand 9 states and 195 transitions. [2024-06-20 15:15:03,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 172 transitions, 1938 flow [2024-06-20 15:15:03,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 172 transitions, 1810 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:03,773 INFO L231 Difference]: Finished difference. Result has 176 places, 149 transitions, 1420 flow [2024-06-20 15:15:03,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1420, PETRI_PLACES=176, PETRI_TRANSITIONS=149} [2024-06-20 15:15:03,773 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-20 15:15:03,773 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 149 transitions, 1420 flow [2024-06-20 15:15:03,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:03,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:03,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:15:03,773 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:03,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash -226144283, now seen corresponding path program 14 times [2024-06-20 15:15:03,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:03,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668442424] [2024-06-20 15:15:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:03,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:03,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:03,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668442424] [2024-06-20 15:15:03,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668442424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:03,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:03,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042190091] [2024-06-20 15:15:03,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:03,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:03,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:03,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:03,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 149 transitions, 1420 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:03,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:03,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:04,159 INFO L124 PetriNetUnfolderBase]: 1393/2395 cut-off events. [2024-06-20 15:15:04,159 INFO L125 PetriNetUnfolderBase]: For 78947/78947 co-relation queries the response was YES. [2024-06-20 15:15:04,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 2395 events. 1393/2395 cut-off events. For 78947/78947 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14079 event pairs, 415 based on Foata normal form. 6/2399 useless extension candidates. Maximal degree in co-relation 11780. Up to 1246 conditions per place. [2024-06-20 15:15:04,176 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 90 selfloop transitions, 76 changer transitions 0/173 dead transitions. [2024-06-20 15:15:04,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 2030 flow [2024-06-20 15:15:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:15:04,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-20 15:15:04,177 INFO L175 Difference]: Start difference. First operand has 176 places, 149 transitions, 1420 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:15:04,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 2030 flow [2024-06-20 15:15:04,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 1939 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:04,294 INFO L231 Difference]: Finished difference. Result has 180 places, 149 transitions, 1485 flow [2024-06-20 15:15:04,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=180, PETRI_TRANSITIONS=149} [2024-06-20 15:15:04,294 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-20 15:15:04,294 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 149 transitions, 1485 flow [2024-06-20 15:15:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:04,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:04,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:15:04,295 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:04,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:04,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1197254731, now seen corresponding path program 15 times [2024-06-20 15:15:04,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:04,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33466876] [2024-06-20 15:15:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:04,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33466876] [2024-06-20 15:15:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33466876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:04,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:04,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256711460] [2024-06-20 15:15:04,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:04,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:04,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:04,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:04,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 149 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:04,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:04,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:04,690 INFO L124 PetriNetUnfolderBase]: 1380/2378 cut-off events. [2024-06-20 15:15:04,690 INFO L125 PetriNetUnfolderBase]: For 74568/74568 co-relation queries the response was YES. [2024-06-20 15:15:04,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11661 conditions, 2378 events. 1380/2378 cut-off events. For 74568/74568 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14006 event pairs, 364 based on Foata normal form. 6/2382 useless extension candidates. Maximal degree in co-relation 11579. Up to 1958 conditions per place. [2024-06-20 15:15:04,709 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 110 selfloop transitions, 50 changer transitions 0/167 dead transitions. [2024-06-20 15:15:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 167 transitions, 1867 flow [2024-06-20 15:15:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-20 15:15:04,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-20 15:15:04,710 INFO L175 Difference]: Start difference. First operand has 180 places, 149 transitions, 1485 flow. Second operand 8 states and 175 transitions. [2024-06-20 15:15:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 167 transitions, 1867 flow [2024-06-20 15:15:04,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 167 transitions, 1607 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:04,834 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 1329 flow [2024-06-20 15:15:04,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1329, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2024-06-20 15:15:04,834 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-06-20 15:15:04,834 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 1329 flow [2024-06-20 15:15:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:04,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:04,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:15:04,835 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:04,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1331484617, now seen corresponding path program 1 times [2024-06-20 15:15:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:04,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480986877] [2024-06-20 15:15:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:04,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:04,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:04,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480986877] [2024-06-20 15:15:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480986877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:04,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962378015] [2024-06-20 15:15:04,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:04,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:04,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 1329 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:04,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:04,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:05,265 INFO L124 PetriNetUnfolderBase]: 1455/2546 cut-off events. [2024-06-20 15:15:05,265 INFO L125 PetriNetUnfolderBase]: For 86579/86580 co-relation queries the response was YES. [2024-06-20 15:15:05,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 2546 events. 1455/2546 cut-off events. For 86579/86580 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15521 event pairs, 247 based on Foata normal form. 19/2564 useless extension candidates. Maximal degree in co-relation 11222. Up to 1667 conditions per place. [2024-06-20 15:15:05,284 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 27 changer transitions 11/184 dead transitions. [2024-06-20 15:15:05,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 184 transitions, 1926 flow [2024-06-20 15:15:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:15:05,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 15:15:05,285 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 1329 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:15:05,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 184 transitions, 1926 flow [2024-06-20 15:15:05,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 184 transitions, 1796 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:05,459 INFO L231 Difference]: Finished difference. Result has 180 places, 149 transitions, 1276 flow [2024-06-20 15:15:05,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1276, PETRI_PLACES=180, PETRI_TRANSITIONS=149} [2024-06-20 15:15:05,459 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-20 15:15:05,460 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 149 transitions, 1276 flow [2024-06-20 15:15:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:05,460 INFO 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] [2024-06-20 15:15:05,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:15:05,460 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:05,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1331186087, now seen corresponding path program 2 times [2024-06-20 15:15:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224534660] [2024-06-20 15:15:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:05,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:05,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224534660] [2024-06-20 15:15:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224534660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:05,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:05,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:05,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433838700] [2024-06-20 15:15:05,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:05,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:05,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:05,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 149 transitions, 1276 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:05,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:05,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:05,884 INFO L124 PetriNetUnfolderBase]: 1371/2398 cut-off events. [2024-06-20 15:15:05,884 INFO L125 PetriNetUnfolderBase]: For 82340/82341 co-relation queries the response was YES. [2024-06-20 15:15:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10588 conditions, 2398 events. 1371/2398 cut-off events. For 82340/82341 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14443 event pairs, 306 based on Foata normal form. 19/2416 useless extension candidates. Maximal degree in co-relation 10505. Up to 1667 conditions per place. [2024-06-20 15:15:05,902 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 138 selfloop transitions, 22 changer transitions 10/177 dead transitions. [2024-06-20 15:15:05,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 177 transitions, 1818 flow [2024-06-20 15:15:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:15:05,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970695970695971 [2024-06-20 15:15:05,903 INFO L175 Difference]: Start difference. First operand has 180 places, 149 transitions, 1276 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:15:05,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 177 transitions, 1818 flow [2024-06-20 15:15:06,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 177 transitions, 1772 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:06,012 INFO L231 Difference]: Finished difference. Result has 179 places, 145 transitions, 1241 flow [2024-06-20 15:15:06,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1241, PETRI_PLACES=179, PETRI_TRANSITIONS=145} [2024-06-20 15:15:06,013 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 139 predicate places. [2024-06-20 15:15:06,013 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 145 transitions, 1241 flow [2024-06-20 15:15:06,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:06,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:06,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:06,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:15:06,013 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:06,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1250014537, now seen corresponding path program 1 times [2024-06-20 15:15:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:06,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579866768] [2024-06-20 15:15:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579866768] [2024-06-20 15:15:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579866768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:06,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:06,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906521238] [2024-06-20 15:15:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:06,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:06,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:06,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:06,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 145 transitions, 1241 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:06,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:06,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:06,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:06,415 INFO L124 PetriNetUnfolderBase]: 1335/2330 cut-off events. [2024-06-20 15:15:06,415 INFO L125 PetriNetUnfolderBase]: For 79146/79147 co-relation queries the response was YES. [2024-06-20 15:15:06,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10262 conditions, 2330 events. 1335/2330 cut-off events. For 79146/79147 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13860 event pairs, 237 based on Foata normal form. 19/2348 useless extension candidates. Maximal degree in co-relation 10180. Up to 1667 conditions per place. [2024-06-20 15:15:06,432 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 136 selfloop transitions, 23 changer transitions 8/174 dead transitions. [2024-06-20 15:15:06,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 174 transitions, 1785 flow [2024-06-20 15:15:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:15:06,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-20 15:15:06,433 INFO L175 Difference]: Start difference. First operand has 179 places, 145 transitions, 1241 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:15:06,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 174 transitions, 1785 flow [2024-06-20 15:15:06,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 1731 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:06,557 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1221 flow [2024-06-20 15:15:06,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-20 15:15:06,558 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-20 15:15:06,558 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1221 flow [2024-06-20 15:15:06,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:06,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:06,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:15:06,558 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:06,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1250008957, now seen corresponding path program 2 times [2024-06-20 15:15:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066795929] [2024-06-20 15:15:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:06,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066795929] [2024-06-20 15:15:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066795929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:06,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:06,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410930406] [2024-06-20 15:15:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:06,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:06,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:06,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1221 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:06,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:06,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:06,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:06,927 INFO L124 PetriNetUnfolderBase]: 1230/2143 cut-off events. [2024-06-20 15:15:06,927 INFO L125 PetriNetUnfolderBase]: For 57123/57124 co-relation queries the response was YES. [2024-06-20 15:15:06,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 2143 events. 1230/2143 cut-off events. For 57123/57124 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12528 event pairs, 219 based on Foata normal form. 19/2161 useless extension candidates. Maximal degree in co-relation 8711. Up to 1667 conditions per place. [2024-06-20 15:15:06,941 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 133 selfloop transitions, 20 changer transitions 10/170 dead transitions. [2024-06-20 15:15:06,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 1647 flow [2024-06-20 15:15:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:15:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:15:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:15:06,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-20 15:15:06,942 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1221 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:15:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 1647 flow [2024-06-20 15:15:07,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 170 transitions, 1597 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:07,086 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1169 flow [2024-06-20 15:15:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-06-20 15:15:07,086 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-20 15:15:07,086 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1169 flow [2024-06-20 15:15:07,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:07,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:07,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:15:07,087 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:07,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:07,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1682775713, now seen corresponding path program 3 times [2024-06-20 15:15:07,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:07,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865364980] [2024-06-20 15:15:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:07,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:07,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:07,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865364980] [2024-06-20 15:15:07,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865364980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:07,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:07,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262649282] [2024-06-20 15:15:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:07,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:07,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:07,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:07,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:07,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:07,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:07,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:07,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:07,489 INFO L124 PetriNetUnfolderBase]: 1283/2240 cut-off events. [2024-06-20 15:15:07,489 INFO L125 PetriNetUnfolderBase]: For 79189/79190 co-relation queries the response was YES. [2024-06-20 15:15:07,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9891 conditions, 2240 events. 1283/2240 cut-off events. For 79189/79190 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13229 event pairs, 239 based on Foata normal form. 19/2258 useless extension candidates. Maximal degree in co-relation 9811. Up to 1579 conditions per place. [2024-06-20 15:15:07,505 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 139 selfloop transitions, 24 changer transitions 8/178 dead transitions. [2024-06-20 15:15:07,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 178 transitions, 1757 flow [2024-06-20 15:15:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-20 15:15:07,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-20 15:15:07,506 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1169 flow. Second operand 10 states and 219 transitions. [2024-06-20 15:15:07,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 178 transitions, 1757 flow [2024-06-20 15:15:07,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 178 transitions, 1685 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:07,612 INFO L231 Difference]: Finished difference. Result has 175 places, 137 transitions, 1133 flow [2024-06-20 15:15:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1133, PETRI_PLACES=175, PETRI_TRANSITIONS=137} [2024-06-20 15:15:07,613 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-20 15:15:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 137 transitions, 1133 flow [2024-06-20 15:15:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:07,613 INFO 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] [2024-06-20 15:15:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:15:07,613 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:07,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2039944023, now seen corresponding path program 4 times [2024-06-20 15:15:07,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:07,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828856129] [2024-06-20 15:15:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:07,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828856129] [2024-06-20 15:15:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828856129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:07,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:07,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:07,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543186598] [2024-06-20 15:15:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:07,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:07,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 137 transitions, 1133 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:07,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:07,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:07,976 INFO L124 PetriNetUnfolderBase]: 1178/2053 cut-off events. [2024-06-20 15:15:07,976 INFO L125 PetriNetUnfolderBase]: For 56992/56993 co-relation queries the response was YES. [2024-06-20 15:15:07,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 2053 events. 1178/2053 cut-off events. For 56992/56993 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11876 event pairs, 227 based on Foata normal form. 19/2071 useless extension candidates. Maximal degree in co-relation 8363. Up to 1579 conditions per place. [2024-06-20 15:15:07,990 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 127 selfloop transitions, 21 changer transitions 12/167 dead transitions. [2024-06-20 15:15:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 167 transitions, 1567 flow [2024-06-20 15:15:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:15:07,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-20 15:15:07,991 INFO L175 Difference]: Start difference. First operand has 175 places, 137 transitions, 1133 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:15:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 167 transitions, 1567 flow [2024-06-20 15:15:08,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 167 transitions, 1492 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:08,089 INFO L231 Difference]: Finished difference. Result has 171 places, 135 transitions, 1089 flow [2024-06-20 15:15:08,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1089, PETRI_PLACES=171, PETRI_TRANSITIONS=135} [2024-06-20 15:15:08,089 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 131 predicate places. [2024-06-20 15:15:08,090 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 135 transitions, 1089 flow [2024-06-20 15:15:08,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:08,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:08,090 INFO 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] [2024-06-20 15:15:08,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:15:08,090 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:08,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2043663093, now seen corresponding path program 5 times [2024-06-20 15:15:08,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:08,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709377029] [2024-06-20 15:15:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:08,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:08,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:08,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709377029] [2024-06-20 15:15:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709377029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:08,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:08,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492574114] [2024-06-20 15:15:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:08,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:08,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:08,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 135 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:08,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:08,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:08,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:08,416 INFO L124 PetriNetUnfolderBase]: 1154/2001 cut-off events. [2024-06-20 15:15:08,416 INFO L125 PetriNetUnfolderBase]: For 56869/56870 co-relation queries the response was YES. [2024-06-20 15:15:08,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8187 conditions, 2001 events. 1154/2001 cut-off events. For 56869/56870 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11451 event pairs, 246 based on Foata normal form. 19/2019 useless extension candidates. Maximal degree in co-relation 8109. Up to 1511 conditions per place. [2024-06-20 15:15:08,428 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 121 selfloop transitions, 17 changer transitions 20/165 dead transitions. [2024-06-20 15:15:08,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 165 transitions, 1519 flow [2024-06-20 15:15:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 15:15:08,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-20 15:15:08,429 INFO L175 Difference]: Start difference. First operand has 171 places, 135 transitions, 1089 flow. Second operand 8 states and 178 transitions. [2024-06-20 15:15:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 165 transitions, 1519 flow [2024-06-20 15:15:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 1473 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:08,516 INFO L231 Difference]: Finished difference. Result has 168 places, 129 transitions, 1026 flow [2024-06-20 15:15:08,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=168, PETRI_TRANSITIONS=129} [2024-06-20 15:15:08,516 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 128 predicate places. [2024-06-20 15:15:08,517 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 129 transitions, 1026 flow [2024-06-20 15:15:08,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:08,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:08,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:08,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:15:08,517 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:08,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash 581354063, now seen corresponding path program 3 times [2024-06-20 15:15:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:08,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920874901] [2024-06-20 15:15:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920874901] [2024-06-20 15:15:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920874901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:08,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:08,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:08,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978283877] [2024-06-20 15:15:08,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:08,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:08,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:08,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 129 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:08,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:08,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:08,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:08,983 INFO L124 PetriNetUnfolderBase]: 1327/2309 cut-off events. [2024-06-20 15:15:08,984 INFO L125 PetriNetUnfolderBase]: For 112385/112386 co-relation queries the response was YES. [2024-06-20 15:15:08,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11487 conditions, 2309 events. 1327/2309 cut-off events. For 112385/112386 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13889 event pairs, 428 based on Foata normal form. 19/2326 useless extension candidates. Maximal degree in co-relation 11410. Up to 1268 conditions per place. [2024-06-20 15:15:08,999 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 116 selfloop transitions, 43 changer transitions 11/177 dead transitions. [2024-06-20 15:15:08,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 1730 flow [2024-06-20 15:15:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:15:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:15:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-20 15:15:09,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601577909270217 [2024-06-20 15:15:09,000 INFO L175 Difference]: Start difference. First operand has 168 places, 129 transitions, 1026 flow. Second operand 13 states and 284 transitions. [2024-06-20 15:15:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 1730 flow [2024-06-20 15:15:09,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 177 transitions, 1623 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:09,152 INFO L231 Difference]: Finished difference. Result has 164 places, 127 transitions, 1006 flow [2024-06-20 15:15:09,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1006, PETRI_PLACES=164, PETRI_TRANSITIONS=127} [2024-06-20 15:15:09,153 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 124 predicate places. [2024-06-20 15:15:09,153 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 127 transitions, 1006 flow [2024-06-20 15:15:09,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:09,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:09,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:15:09,154 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:09,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1305194137, now seen corresponding path program 4 times [2024-06-20 15:15:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:09,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014691816] [2024-06-20 15:15:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:09,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:09,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014691816] [2024-06-20 15:15:09,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014691816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:09,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:09,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:09,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934116140] [2024-06-20 15:15:09,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:09,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:09,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 127 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:09,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:09,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:09,610 INFO L124 PetriNetUnfolderBase]: 1390/2390 cut-off events. [2024-06-20 15:15:09,610 INFO L125 PetriNetUnfolderBase]: For 129634/129635 co-relation queries the response was YES. [2024-06-20 15:15:09,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12711 conditions, 2390 events. 1390/2390 cut-off events. For 129634/129635 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14380 event pairs, 490 based on Foata normal form. 19/2407 useless extension candidates. Maximal degree in co-relation 12639. Up to 1268 conditions per place. [2024-06-20 15:15:09,630 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 41 changer transitions 9/172 dead transitions. [2024-06-20 15:15:09,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 172 transitions, 1684 flow [2024-06-20 15:15:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:15:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:15:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-20 15:15:09,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542406311637081 [2024-06-20 15:15:09,632 INFO L175 Difference]: Start difference. First operand has 164 places, 127 transitions, 1006 flow. Second operand 13 states and 281 transitions. [2024-06-20 15:15:09,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 172 transitions, 1684 flow [2024-06-20 15:15:09,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 172 transitions, 1588 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:09,738 INFO L231 Difference]: Finished difference. Result has 163 places, 124 transitions, 980 flow [2024-06-20 15:15:09,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=980, PETRI_PLACES=163, PETRI_TRANSITIONS=124} [2024-06-20 15:15:09,738 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-06-20 15:15:09,738 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 124 transitions, 980 flow [2024-06-20 15:15:09,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:09,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:15:09,739 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:09,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1103806357, now seen corresponding path program 5 times [2024-06-20 15:15:09,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:09,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247693323] [2024-06-20 15:15:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:09,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:09,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247693323] [2024-06-20 15:15:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247693323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:09,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:09,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:09,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165017944] [2024-06-20 15:15:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:09,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:09,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 124 transitions, 980 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:09,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:09,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:10,162 INFO L124 PetriNetUnfolderBase]: 1264/2172 cut-off events. [2024-06-20 15:15:10,162 INFO L125 PetriNetUnfolderBase]: For 105454/105455 co-relation queries the response was YES. [2024-06-20 15:15:10,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 2172 events. 1264/2172 cut-off events. For 105454/105455 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12751 event pairs, 474 based on Foata normal form. 25/2195 useless extension candidates. Maximal degree in co-relation 10774. Up to 1502 conditions per place. [2024-06-20 15:15:10,175 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 104 selfloop transitions, 38 changer transitions 13/162 dead transitions. [2024-06-20 15:15:10,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 162 transitions, 1514 flow [2024-06-20 15:15:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-20 15:15:10,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491452991452992 [2024-06-20 15:15:10,176 INFO L175 Difference]: Start difference. First operand has 163 places, 124 transitions, 980 flow. Second operand 12 states and 257 transitions. [2024-06-20 15:15:10,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 162 transitions, 1514 flow [2024-06-20 15:15:10,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 1421 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-20 15:15:10,256 INFO L231 Difference]: Finished difference. Result has 159 places, 121 transitions, 944 flow [2024-06-20 15:15:10,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=944, PETRI_PLACES=159, PETRI_TRANSITIONS=121} [2024-06-20 15:15:10,256 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 119 predicate places. [2024-06-20 15:15:10,256 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 121 transitions, 944 flow [2024-06-20 15:15:10,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:10,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:10,257 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] [2024-06-20 15:15:10,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:15:10,257 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:10,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -555989371, now seen corresponding path program 6 times [2024-06-20 15:15:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075687409] [2024-06-20 15:15:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:10,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:10,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075687409] [2024-06-20 15:15:10,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075687409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:10,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:10,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388409741] [2024-06-20 15:15:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:10,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:10,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 121 transitions, 944 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:10,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:10,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:10,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:10,677 INFO L124 PetriNetUnfolderBase]: 1204/2068 cut-off events. [2024-06-20 15:15:10,677 INFO L125 PetriNetUnfolderBase]: For 98733/98734 co-relation queries the response was YES. [2024-06-20 15:15:10,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10303 conditions, 2068 events. 1204/2068 cut-off events. For 98733/98734 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11989 event pairs, 508 based on Foata normal form. 27/2093 useless extension candidates. Maximal degree in co-relation 10234. Up to 1713 conditions per place. [2024-06-20 15:15:10,690 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 92 selfloop transitions, 33 changer transitions 17/149 dead transitions. [2024-06-20 15:15:10,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 149 transitions, 1316 flow [2024-06-20 15:15:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-20 15:15:10,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-20 15:15:10,691 INFO L175 Difference]: Start difference. First operand has 159 places, 121 transitions, 944 flow. Second operand 12 states and 247 transitions. [2024-06-20 15:15:10,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 149 transitions, 1316 flow [2024-06-20 15:15:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 1242 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:10,766 INFO L231 Difference]: Finished difference. Result has 157 places, 116 transitions, 904 flow [2024-06-20 15:15:10,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=904, PETRI_PLACES=157, PETRI_TRANSITIONS=116} [2024-06-20 15:15:10,766 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-20 15:15:10,766 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 116 transitions, 904 flow [2024-06-20 15:15:10,767 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) [2024-06-20 15:15:10,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:10,767 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] [2024-06-20 15:15:10,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:15:10,767 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:10,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -268892791, now seen corresponding path program 7 times [2024-06-20 15:15:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33616592] [2024-06-20 15:15:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:10,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33616592] [2024-06-20 15:15:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33616592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:10,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:10,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:10,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472283358] [2024-06-20 15:15:10,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:10,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:10,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:10,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:10,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 116 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:10,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:10,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:10,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:11,142 INFO L124 PetriNetUnfolderBase]: 1071/1833 cut-off events. [2024-06-20 15:15:11,142 INFO L125 PetriNetUnfolderBase]: For 70450/70451 co-relation queries the response was YES. [2024-06-20 15:15:11,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 1833 events. 1071/1833 cut-off events. For 70450/70451 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10247 event pairs, 374 based on Foata normal form. 25/1856 useless extension candidates. Maximal degree in co-relation 8379. Up to 1268 conditions per place. [2024-06-20 15:15:11,154 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 99 selfloop transitions, 31 changer transitions 10/147 dead transitions. [2024-06-20 15:15:11,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 147 transitions, 1384 flow [2024-06-20 15:15:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-20 15:15:11,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407925407925408 [2024-06-20 15:15:11,155 INFO L175 Difference]: Start difference. First operand has 157 places, 116 transitions, 904 flow. Second operand 11 states and 232 transitions. [2024-06-20 15:15:11,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 147 transitions, 1384 flow [2024-06-20 15:15:11,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 147 transitions, 1306 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:11,219 INFO L231 Difference]: Finished difference. Result has 152 places, 113 transitions, 872 flow [2024-06-20 15:15:11,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=872, PETRI_PLACES=152, PETRI_TRANSITIONS=113} [2024-06-20 15:15:11,219 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-20 15:15:11,219 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 113 transitions, 872 flow [2024-06-20 15:15:11,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:11,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:11,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:15:11,220 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:11,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550647, now seen corresponding path program 8 times [2024-06-20 15:15:11,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:11,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37727928] [2024-06-20 15:15:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:11,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37727928] [2024-06-20 15:15:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37727928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:11,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95047345] [2024-06-20 15:15:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:11,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:11,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 113 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:11,557 INFO L124 PetriNetUnfolderBase]: 920/1580 cut-off events. [2024-06-20 15:15:11,557 INFO L125 PetriNetUnfolderBase]: For 44766/44767 co-relation queries the response was YES. [2024-06-20 15:15:11,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6447 conditions, 1580 events. 920/1580 cut-off events. For 44766/44767 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8618 event pairs, 331 based on Foata normal form. 27/1605 useless extension candidates. Maximal degree in co-relation 6381. Up to 1268 conditions per place. [2024-06-20 15:15:11,566 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 85 selfloop transitions, 25 changer transitions 19/136 dead transitions. [2024-06-20 15:15:11,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 136 transitions, 1206 flow [2024-06-20 15:15:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-20 15:15:11,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-20 15:15:11,567 INFO L175 Difference]: Start difference. First operand has 152 places, 113 transitions, 872 flow. Second operand 10 states and 207 transitions. [2024-06-20 15:15:11,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 136 transitions, 1206 flow [2024-06-20 15:15:11,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1143 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:11,613 INFO L231 Difference]: Finished difference. Result has 149 places, 107 transitions, 818 flow [2024-06-20 15:15:11,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=818, PETRI_PLACES=149, PETRI_TRANSITIONS=107} [2024-06-20 15:15:11,613 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 109 predicate places. [2024-06-20 15:15:11,613 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 107 transitions, 818 flow [2024-06-20 15:15:11,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:11,613 INFO 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] [2024-06-20 15:15:11,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:15:11,613 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:11,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash -726767457, now seen corresponding path program 9 times [2024-06-20 15:15:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:11,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828373366] [2024-06-20 15:15:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:11,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:11,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:11,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828373366] [2024-06-20 15:15:11,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828373366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:11,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:11,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909413255] [2024-06-20 15:15:11,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:11,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:11,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 107 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:11,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:12,031 INFO L124 PetriNetUnfolderBase]: 1088/1879 cut-off events. [2024-06-20 15:15:12,031 INFO L125 PetriNetUnfolderBase]: For 70672/70673 co-relation queries the response was YES. [2024-06-20 15:15:12,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 1879 events. 1088/1879 cut-off events. For 70672/70673 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10782 event pairs, 321 based on Foata normal form. 19/1896 useless extension candidates. Maximal degree in co-relation 8918. Up to 1050 conditions per place. [2024-06-20 15:15:12,043 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 103 selfloop transitions, 29 changer transitions 15/154 dead transitions. [2024-06-20 15:15:12,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 154 transitions, 1442 flow [2024-06-20 15:15:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-20 15:15:12,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534188034188035 [2024-06-20 15:15:12,043 INFO L175 Difference]: Start difference. First operand has 149 places, 107 transitions, 818 flow. Second operand 12 states and 259 transitions. [2024-06-20 15:15:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 154 transitions, 1442 flow [2024-06-20 15:15:12,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 154 transitions, 1368 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:12,102 INFO L231 Difference]: Finished difference. Result has 143 places, 105 transitions, 807 flow [2024-06-20 15:15:12,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=807, PETRI_PLACES=143, PETRI_TRANSITIONS=105} [2024-06-20 15:15:12,102 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-20 15:15:12,102 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 105 transitions, 807 flow [2024-06-20 15:15:12,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:12,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:12,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:15:12,103 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:12,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:12,103 INFO L85 PathProgramCache]: Analyzing trace with hash -715458953, now seen corresponding path program 10 times [2024-06-20 15:15:12,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:12,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642437409] [2024-06-20 15:15:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:12,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:12,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:12,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642437409] [2024-06-20 15:15:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642437409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:12,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:12,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:12,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450431649] [2024-06-20 15:15:12,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:12,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:12,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:12,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:12,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:12,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 105 transitions, 807 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:12,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:12,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:12,460 INFO L124 PetriNetUnfolderBase]: 956/1649 cut-off events. [2024-06-20 15:15:12,460 INFO L125 PetriNetUnfolderBase]: For 48770/48771 co-relation queries the response was YES. [2024-06-20 15:15:12,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7454 conditions, 1649 events. 956/1649 cut-off events. For 48770/48771 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9182 event pairs, 317 based on Foata normal form. 19/1666 useless extension candidates. Maximal degree in co-relation 7392. Up to 1050 conditions per place. [2024-06-20 15:15:12,469 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 26 changer transitions 18/138 dead transitions. [2024-06-20 15:15:12,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 138 transitions, 1261 flow [2024-06-20 15:15:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-20 15:15:12,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-20 15:15:12,470 INFO L175 Difference]: Start difference. First operand has 143 places, 105 transitions, 807 flow. Second operand 10 states and 215 transitions. [2024-06-20 15:15:12,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 138 transitions, 1261 flow [2024-06-20 15:15:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 1196 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:12,511 INFO L231 Difference]: Finished difference. Result has 140 places, 102 transitions, 783 flow [2024-06-20 15:15:12,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=783, PETRI_PLACES=140, PETRI_TRANSITIONS=102} [2024-06-20 15:15:12,512 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-20 15:15:12,512 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 102 transitions, 783 flow [2024-06-20 15:15:12,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:12,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:12,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:15:12,512 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:12,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:12,513 INFO L85 PathProgramCache]: Analyzing trace with hash -877758099, now seen corresponding path program 11 times [2024-06-20 15:15:12,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:12,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760250044] [2024-06-20 15:15:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:12,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:12,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760250044] [2024-06-20 15:15:12,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760250044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:12,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:12,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:12,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275373572] [2024-06-20 15:15:12,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:12,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:12,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:12,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 102 transitions, 783 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:12,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:12,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:12,838 INFO L124 PetriNetUnfolderBase]: 1093/1877 cut-off events. [2024-06-20 15:15:12,839 INFO L125 PetriNetUnfolderBase]: For 61868/61868 co-relation queries the response was YES. [2024-06-20 15:15:12,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 1877 events. 1093/1877 cut-off events. For 61868/61868 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10817 event pairs, 288 based on Foata normal form. 18/1892 useless extension candidates. Maximal degree in co-relation 8903. Up to 849 conditions per place. [2024-06-20 15:15:12,849 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 76 selfloop transitions, 27 changer transitions 22/132 dead transitions. [2024-06-20 15:15:12,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 132 transitions, 1230 flow [2024-06-20 15:15:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 15:15:12,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-20 15:15:12,850 INFO L175 Difference]: Start difference. First operand has 140 places, 102 transitions, 783 flow. Second operand 8 states and 178 transitions. [2024-06-20 15:15:12,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 132 transitions, 1230 flow [2024-06-20 15:15:12,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 132 transitions, 1166 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:12,898 INFO L231 Difference]: Finished difference. Result has 133 places, 97 transitions, 745 flow [2024-06-20 15:15:12,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=745, PETRI_PLACES=133, PETRI_TRANSITIONS=97} [2024-06-20 15:15:12,898 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 93 predicate places. [2024-06-20 15:15:12,898 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 97 transitions, 745 flow [2024-06-20 15:15:12,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:12,898 INFO 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] [2024-06-20 15:15:12,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:15:12,898 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:12,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1264797321, now seen corresponding path program 12 times [2024-06-20 15:15:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056951999] [2024-06-20 15:15:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:12,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056951999] [2024-06-20 15:15:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056951999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:12,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:12,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682524870] [2024-06-20 15:15:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:13,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:13,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 97 transitions, 745 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:13,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:13,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,252 INFO L124 PetriNetUnfolderBase]: 951/1608 cut-off events. [2024-06-20 15:15:13,252 INFO L125 PetriNetUnfolderBase]: For 46701/46701 co-relation queries the response was YES. [2024-06-20 15:15:13,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7258 conditions, 1608 events. 951/1608 cut-off events. For 46701/46701 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8885 event pairs, 384 based on Foata normal form. 26/1634 useless extension candidates. Maximal degree in co-relation 7199. Up to 1337 conditions per place. [2024-06-20 15:15:13,261 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 69 selfloop transitions, 23 changer transitions 12/111 dead transitions. [2024-06-20 15:15:13,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 111 transitions, 1005 flow [2024-06-20 15:15:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 15:15:13,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-20 15:15:13,262 INFO L175 Difference]: Start difference. First operand has 133 places, 97 transitions, 745 flow. Second operand 10 states and 197 transitions. [2024-06-20 15:15:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 111 transitions, 1005 flow [2024-06-20 15:15:13,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 111 transitions, 938 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:13,288 INFO L231 Difference]: Finished difference. Result has 126 places, 93 transitions, 698 flow [2024-06-20 15:15:13,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=126, PETRI_TRANSITIONS=93} [2024-06-20 15:15:13,288 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-20 15:15:13,288 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 93 transitions, 698 flow [2024-06-20 15:15:13,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:13,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:15:13,289 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:13,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 57430817, now seen corresponding path program 6 times [2024-06-20 15:15:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123915480] [2024-06-20 15:15:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123915480] [2024-06-20 15:15:13,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123915480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:13,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328848124] [2024-06-20 15:15:13,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:13,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:13,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 93 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:13,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:13,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,587 INFO L124 PetriNetUnfolderBase]: 757/1286 cut-off events. [2024-06-20 15:15:13,588 INFO L125 PetriNetUnfolderBase]: For 24830/24830 co-relation queries the response was YES. [2024-06-20 15:15:13,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1286 events. 757/1286 cut-off events. For 24830/24830 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6739 event pairs, 283 based on Foata normal form. 26/1312 useless extension candidates. Maximal degree in co-relation 5121. Up to 1030 conditions per place. [2024-06-20 15:15:13,593 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 68 selfloop transitions, 19 changer transitions 12/106 dead transitions. [2024-06-20 15:15:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 946 flow [2024-06-20 15:15:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:15:13,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071225071225072 [2024-06-20 15:15:13,594 INFO L175 Difference]: Start difference. First operand has 126 places, 93 transitions, 698 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:15:13,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 946 flow [2024-06-20 15:15:13,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 896 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:13,612 INFO L231 Difference]: Finished difference. Result has 123 places, 89 transitions, 661 flow [2024-06-20 15:15:13,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=123, PETRI_TRANSITIONS=89} [2024-06-20 15:15:13,612 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-06-20 15:15:13,612 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 89 transitions, 661 flow [2024-06-20 15:15:13,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:13,612 INFO 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] [2024-06-20 15:15:13,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:15:13,613 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:13,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:13,613 INFO L85 PathProgramCache]: Analyzing trace with hash 63151247, now seen corresponding path program 7 times [2024-06-20 15:15:13,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629391051] [2024-06-20 15:15:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:13,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629391051] [2024-06-20 15:15:13,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629391051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:13,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:13,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092948504] [2024-06-20 15:15:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:13,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:13,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:13,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:13,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 89 transitions, 661 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:13,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:13,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,910 INFO L124 PetriNetUnfolderBase]: 742/1281 cut-off events. [2024-06-20 15:15:13,911 INFO L125 PetriNetUnfolderBase]: For 22233/22233 co-relation queries the response was YES. [2024-06-20 15:15:13,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5052 conditions, 1281 events. 742/1281 cut-off events. For 22233/22233 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6787 event pairs, 245 based on Foata normal form. 24/1305 useless extension candidates. Maximal degree in co-relation 4999. Up to 982 conditions per place. [2024-06-20 15:15:13,916 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 66 selfloop transitions, 16 changer transitions 17/106 dead transitions. [2024-06-20 15:15:13,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 106 transitions, 933 flow [2024-06-20 15:15:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 15:15:13,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-20 15:15:13,917 INFO L175 Difference]: Start difference. First operand has 123 places, 89 transitions, 661 flow. Second operand 9 states and 179 transitions. [2024-06-20 15:15:13,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 106 transitions, 933 flow [2024-06-20 15:15:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 106 transitions, 891 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:13,935 INFO L231 Difference]: Finished difference. Result has 121 places, 85 transitions, 621 flow [2024-06-20 15:15:13,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=621, PETRI_PLACES=121, PETRI_TRANSITIONS=85} [2024-06-20 15:15:13,936 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 81 predicate places. [2024-06-20 15:15:13,936 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 85 transitions, 621 flow [2024-06-20 15:15:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:13,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:13,936 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] [2024-06-20 15:15:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:15:13,936 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:13,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 52247927, now seen corresponding path program 8 times [2024-06-20 15:15:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649006544] [2024-06-20 15:15:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649006544] [2024-06-20 15:15:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649006544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887639764] [2024-06-20 15:15:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:14,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:14,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 85 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:14,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:14,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:14,249 INFO L124 PetriNetUnfolderBase]: 709/1222 cut-off events. [2024-06-20 15:15:14,249 INFO L125 PetriNetUnfolderBase]: For 21017/21017 co-relation queries the response was YES. [2024-06-20 15:15:14,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 1222 events. 709/1222 cut-off events. For 21017/21017 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6432 event pairs, 225 based on Foata normal form. 24/1246 useless extension candidates. Maximal degree in co-relation 4765. Up to 902 conditions per place. [2024-06-20 15:15:14,254 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 69 selfloop transitions, 14 changer transitions 11/101 dead transitions. [2024-06-20 15:15:14,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 101 transitions, 881 flow [2024-06-20 15:15:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 15:15:14,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-20 15:15:14,255 INFO L175 Difference]: Start difference. First operand has 121 places, 85 transitions, 621 flow. Second operand 8 states and 162 transitions. [2024-06-20 15:15:14,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 101 transitions, 881 flow [2024-06-20 15:15:14,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 101 transitions, 843 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:14,270 INFO L231 Difference]: Finished difference. Result has 116 places, 81 transitions, 579 flow [2024-06-20 15:15:14,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=116, PETRI_TRANSITIONS=81} [2024-06-20 15:15:14,271 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 76 predicate places. [2024-06-20 15:15:14,271 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 81 transitions, 579 flow [2024-06-20 15:15:14,271 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) [2024-06-20 15:15:14,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:14,271 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] [2024-06-20 15:15:14,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:15:14,271 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:14,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 63353057, now seen corresponding path program 9 times [2024-06-20 15:15:14,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:14,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348613495] [2024-06-20 15:15:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:14,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348613495] [2024-06-20 15:15:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348613495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285703933] [2024-06-20 15:15:14,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:14,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:14,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 81 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:14,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:14,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:14,560 INFO L124 PetriNetUnfolderBase]: 757/1314 cut-off events. [2024-06-20 15:15:14,560 INFO L125 PetriNetUnfolderBase]: For 22353/22353 co-relation queries the response was YES. [2024-06-20 15:15:14,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5427 conditions, 1314 events. 757/1314 cut-off events. For 22353/22353 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7096 event pairs, 217 based on Foata normal form. 18/1332 useless extension candidates. Maximal degree in co-relation 5377. Up to 826 conditions per place. [2024-06-20 15:15:14,566 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 72 selfloop transitions, 17 changer transitions 8/104 dead transitions. [2024-06-20 15:15:14,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 104 transitions, 920 flow [2024-06-20 15:15:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:15:14,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-20 15:15:14,567 INFO L175 Difference]: Start difference. First operand has 116 places, 81 transitions, 579 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:15:14,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 104 transitions, 920 flow [2024-06-20 15:15:14,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 877 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:14,581 INFO L231 Difference]: Finished difference. Result has 115 places, 80 transitions, 571 flow [2024-06-20 15:15:14,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=115, PETRI_TRANSITIONS=80} [2024-06-20 15:15:14,581 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-20 15:15:14,581 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 80 transitions, 571 flow [2024-06-20 15:15:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:14,581 INFO 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] [2024-06-20 15:15:14,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:15:14,582 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:14,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1265840131, now seen corresponding path program 10 times [2024-06-20 15:15:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:14,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833309715] [2024-06-20 15:15:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833309715] [2024-06-20 15:15:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833309715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242061848] [2024-06-20 15:15:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:14,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:14,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 80 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:14,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:14,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:14,859 INFO L124 PetriNetUnfolderBase]: 652/1129 cut-off events. [2024-06-20 15:15:14,859 INFO L125 PetriNetUnfolderBase]: For 16493/16493 co-relation queries the response was YES. [2024-06-20 15:15:14,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 1129 events. 652/1129 cut-off events. For 16493/16493 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5841 event pairs, 195 based on Foata normal form. 18/1147 useless extension candidates. Maximal degree in co-relation 4407. Up to 826 conditions per place. [2024-06-20 15:15:14,864 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 66 selfloop transitions, 15 changer transitions 11/99 dead transitions. [2024-06-20 15:15:14,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 99 transitions, 833 flow [2024-06-20 15:15:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:15:14,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156695156695157 [2024-06-20 15:15:14,865 INFO L175 Difference]: Start difference. First operand has 115 places, 80 transitions, 571 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:15:14,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 99 transitions, 833 flow [2024-06-20 15:15:14,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 795 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:14,878 INFO L231 Difference]: Finished difference. Result has 115 places, 75 transitions, 528 flow [2024-06-20 15:15:14,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=75} [2024-06-20 15:15:14,878 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2024-06-20 15:15:14,878 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 75 transitions, 528 flow [2024-06-20 15:15:14,878 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) [2024-06-20 15:15:14,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:14,878 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, 1] [2024-06-20 15:15:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:15:14,878 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:14,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -9041131, now seen corresponding path program 11 times [2024-06-20 15:15:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554819105] [2024-06-20 15:15:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554819105] [2024-06-20 15:15:14,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554819105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:14,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874652189] [2024-06-20 15:15:14,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:14,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:15,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:15,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 75 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:15,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:15,194 INFO L124 PetriNetUnfolderBase]: 724/1261 cut-off events. [2024-06-20 15:15:15,194 INFO L125 PetriNetUnfolderBase]: For 22053/22053 co-relation queries the response was YES. [2024-06-20 15:15:15,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5246 conditions, 1261 events. 724/1261 cut-off events. For 22053/22053 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6740 event pairs, 100 based on Foata normal form. 18/1279 useless extension candidates. Maximal degree in co-relation 5197. Up to 734 conditions per place. [2024-06-20 15:15:15,200 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 70 selfloop transitions, 22 changer transitions 8/107 dead transitions. [2024-06-20 15:15:15,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 107 transitions, 909 flow [2024-06-20 15:15:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-20 15:15:15,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2024-06-20 15:15:15,201 INFO L175 Difference]: Start difference. First operand has 115 places, 75 transitions, 528 flow. Second operand 11 states and 224 transitions. [2024-06-20 15:15:15,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 107 transitions, 909 flow [2024-06-20 15:15:15,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 855 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-20 15:15:15,216 INFO L231 Difference]: Finished difference. Result has 112 places, 74 transitions, 518 flow [2024-06-20 15:15:15,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=518, PETRI_PLACES=112, PETRI_TRANSITIONS=74} [2024-06-20 15:15:15,216 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 72 predicate places. [2024-06-20 15:15:15,216 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 74 transitions, 518 flow [2024-06-20 15:15:15,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:15,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:15,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:15:15,217 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:15,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1633105389, now seen corresponding path program 12 times [2024-06-20 15:15:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:15,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874950421] [2024-06-20 15:15:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:15,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874950421] [2024-06-20 15:15:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874950421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:15,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:15,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689750184] [2024-06-20 15:15:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:15,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:15,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:15,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:15,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 74 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:15,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:15,509 INFO L124 PetriNetUnfolderBase]: 619/1074 cut-off events. [2024-06-20 15:15:15,509 INFO L125 PetriNetUnfolderBase]: For 15981/15981 co-relation queries the response was YES. [2024-06-20 15:15:15,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 1074 events. 619/1074 cut-off events. For 15981/15981 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5462 event pairs, 88 based on Foata normal form. 18/1092 useless extension candidates. Maximal degree in co-relation 4223. Up to 734 conditions per place. [2024-06-20 15:15:15,514 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 58 selfloop transitions, 18 changer transitions 13/96 dead transitions. [2024-06-20 15:15:15,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 96 transitions, 788 flow [2024-06-20 15:15:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 15:15:15,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270655270655271 [2024-06-20 15:15:15,515 INFO L175 Difference]: Start difference. First operand has 112 places, 74 transitions, 518 flow. Second operand 9 states and 185 transitions. [2024-06-20 15:15:15,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 96 transitions, 788 flow [2024-06-20 15:15:15,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 96 transitions, 740 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:15,526 INFO L231 Difference]: Finished difference. Result has 110 places, 71 transitions, 485 flow [2024-06-20 15:15:15,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=110, PETRI_TRANSITIONS=71} [2024-06-20 15:15:15,527 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-20 15:15:15,527 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 71 transitions, 485 flow [2024-06-20 15:15:15,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:15,527 INFO 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] [2024-06-20 15:15:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:15:15,527 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:15,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1632903579, now seen corresponding path program 13 times [2024-06-20 15:15:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180160859] [2024-06-20 15:15:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:15,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:15,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:15,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180160859] [2024-06-20 15:15:15,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180160859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:15,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:15,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926825701] [2024-06-20 15:15:15,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:15,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:15,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 71 transitions, 485 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:15,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:15,778 INFO L124 PetriNetUnfolderBase]: 611/1058 cut-off events. [2024-06-20 15:15:15,778 INFO L125 PetriNetUnfolderBase]: For 15942/15942 co-relation queries the response was YES. [2024-06-20 15:15:15,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 1058 events. 611/1058 cut-off events. For 15942/15942 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5340 event pairs, 81 based on Foata normal form. 18/1074 useless extension candidates. Maximal degree in co-relation 4131. Up to 698 conditions per place. [2024-06-20 15:15:15,784 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 52 selfloop transitions, 13 changer transitions 21/93 dead transitions. [2024-06-20 15:15:15,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 752 flow [2024-06-20 15:15:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-20 15:15:15,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-20 15:15:15,785 INFO L175 Difference]: Start difference. First operand has 110 places, 71 transitions, 485 flow. Second operand 8 states and 167 transitions. [2024-06-20 15:15:15,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 752 flow [2024-06-20 15:15:15,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 706 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:15,798 INFO L231 Difference]: Finished difference. Result has 105 places, 65 transitions, 427 flow [2024-06-20 15:15:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=105, PETRI_TRANSITIONS=65} [2024-06-20 15:15:15,798 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2024-06-20 15:15:15,799 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 65 transitions, 427 flow [2024-06-20 15:15:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:15,799 INFO 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] [2024-06-20 15:15:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:15:15,799 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 833172113, now seen corresponding path program 14 times [2024-06-20 15:15:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845449843] [2024-06-20 15:15:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:15,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:15,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845449843] [2024-06-20 15:15:15,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845449843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:15,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:15,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:15,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119421229] [2024-06-20 15:15:15,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:15,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:15,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:15,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:15,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 65 transitions, 427 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:15,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:15,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:15,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,071 INFO L124 PetriNetUnfolderBase]: 692/1191 cut-off events. [2024-06-20 15:15:16,071 INFO L125 PetriNetUnfolderBase]: For 26106/26106 co-relation queries the response was YES. [2024-06-20 15:15:16,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1191 events. 692/1191 cut-off events. For 26106/26106 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6252 event pairs, 289 based on Foata normal form. 24/1215 useless extension candidates. Maximal degree in co-relation 5151. Up to 719 conditions per place. [2024-06-20 15:15:16,077 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 56 selfloop transitions, 13 changer transitions 10/86 dead transitions. [2024-06-20 15:15:16,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 86 transitions, 725 flow [2024-06-20 15:15:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 15:15:16,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2024-06-20 15:15:16,078 INFO L175 Difference]: Start difference. First operand has 105 places, 65 transitions, 427 flow. Second operand 10 states and 197 transitions. [2024-06-20 15:15:16,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 86 transitions, 725 flow [2024-06-20 15:15:16,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 661 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:16,090 INFO L231 Difference]: Finished difference. Result has 99 places, 62 transitions, 374 flow [2024-06-20 15:15:16,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=374, PETRI_PLACES=99, PETRI_TRANSITIONS=62} [2024-06-20 15:15:16,090 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2024-06-20 15:15:16,091 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 62 transitions, 374 flow [2024-06-20 15:15:16,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:16,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:16,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:15:16,091 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:16,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 794065867, now seen corresponding path program 15 times [2024-06-20 15:15:16,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:16,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144601030] [2024-06-20 15:15:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:16,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:16,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144601030] [2024-06-20 15:15:16,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144601030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:16,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:16,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:16,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921771787] [2024-06-20 15:15:16,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:16,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:16,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:16,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:16,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 62 transitions, 374 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:16,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:16,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,359 INFO L124 PetriNetUnfolderBase]: 802/1397 cut-off events. [2024-06-20 15:15:16,359 INFO L125 PetriNetUnfolderBase]: For 35532/35532 co-relation queries the response was YES. [2024-06-20 15:15:16,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 1397 events. 802/1397 cut-off events. For 35532/35532 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7829 event pairs, 346 based on Foata normal form. 18/1415 useless extension candidates. Maximal degree in co-relation 6479. Up to 527 conditions per place. [2024-06-20 15:15:16,365 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 57 selfloop transitions, 13 changer transitions 13/90 dead transitions. [2024-06-20 15:15:16,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 90 transitions, 752 flow [2024-06-20 15:15:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 15:15:16,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2024-06-20 15:15:16,366 INFO L175 Difference]: Start difference. First operand has 99 places, 62 transitions, 374 flow. Second operand 10 states and 206 transitions. [2024-06-20 15:15:16,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 90 transitions, 752 flow [2024-06-20 15:15:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 90 transitions, 717 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:16,380 INFO L231 Difference]: Finished difference. Result has 98 places, 59 transitions, 360 flow [2024-06-20 15:15:16,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=360, PETRI_PLACES=98, PETRI_TRANSITIONS=59} [2024-06-20 15:15:16,380 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 58 predicate places. [2024-06-20 15:15:16,380 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 59 transitions, 360 flow [2024-06-20 15:15:16,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:16,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:16,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:15:16,381 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:16,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash 68978935, now seen corresponding path program 16 times [2024-06-20 15:15:16,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:16,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636672921] [2024-06-20 15:15:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:16,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:16,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636672921] [2024-06-20 15:15:16,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636672921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:16,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:16,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:16,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556517556] [2024-06-20 15:15:16,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:16,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:16,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 59 transitions, 360 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:16,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,643 INFO L124 PetriNetUnfolderBase]: 659/1148 cut-off events. [2024-06-20 15:15:16,643 INFO L125 PetriNetUnfolderBase]: For 27356/27356 co-relation queries the response was YES. [2024-06-20 15:15:16,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5082 conditions, 1148 events. 659/1148 cut-off events. For 27356/27356 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6083 event pairs, 374 based on Foata normal form. 26/1174 useless extension candidates. Maximal degree in co-relation 5041. Up to 921 conditions per place. [2024-06-20 15:15:16,647 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 43 selfloop transitions, 8 changer transitions 14/72 dead transitions. [2024-06-20 15:15:16,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 72 transitions, 540 flow [2024-06-20 15:15:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 15:15:16,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-20 15:15:16,648 INFO L175 Difference]: Start difference. First operand has 98 places, 59 transitions, 360 flow. Second operand 9 states and 172 transitions. [2024-06-20 15:15:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 72 transitions, 540 flow [2024-06-20 15:15:16,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 72 transitions, 510 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:16,659 INFO L231 Difference]: Finished difference. Result has 94 places, 54 transitions, 315 flow [2024-06-20 15:15:16,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=315, PETRI_PLACES=94, PETRI_TRANSITIONS=54} [2024-06-20 15:15:16,660 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 54 predicate places. [2024-06-20 15:15:16,660 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 54 transitions, 315 flow [2024-06-20 15:15:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:16,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:16,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:15:16,660 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:16,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1909175903, now seen corresponding path program 17 times [2024-06-20 15:15:16,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101244642] [2024-06-20 15:15:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:16,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:16,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101244642] [2024-06-20 15:15:16,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101244642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:16,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:16,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837803923] [2024-06-20 15:15:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:16,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:16,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:16,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 54 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:16,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:16,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,938 INFO L124 PetriNetUnfolderBase]: 542/963 cut-off events. [2024-06-20 15:15:16,938 INFO L125 PetriNetUnfolderBase]: For 16324/16324 co-relation queries the response was YES. [2024-06-20 15:15:16,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 963 events. 542/963 cut-off events. For 16324/16324 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4904 event pairs, 186 based on Foata normal form. 18/981 useless extension candidates. Maximal degree in co-relation 3871. Up to 568 conditions per place. [2024-06-20 15:15:16,942 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 54 selfloop transitions, 9 changer transitions 12/82 dead transitions. [2024-06-20 15:15:16,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 82 transitions, 613 flow [2024-06-20 15:15:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 15:15:16,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-20 15:15:16,942 INFO L175 Difference]: Start difference. First operand has 94 places, 54 transitions, 315 flow. Second operand 11 states and 213 transitions. [2024-06-20 15:15:16,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 82 transitions, 613 flow [2024-06-20 15:15:16,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 560 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:16,949 INFO L231 Difference]: Finished difference. Result has 89 places, 52 transitions, 289 flow [2024-06-20 15:15:16,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=52} [2024-06-20 15:15:16,949 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-20 15:15:16,949 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 52 transitions, 289 flow [2024-06-20 15:15:16,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:16,949 INFO 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] [2024-06-20 15:15:16,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:15:16,950 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:16,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1064905181, now seen corresponding path program 18 times [2024-06-20 15:15:16,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:16,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163634151] [2024-06-20 15:15:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:17,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163634151] [2024-06-20 15:15:17,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163634151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:17,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:17,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687779693] [2024-06-20 15:15:17,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:17,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:17,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:17,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:17,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:17,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 52 transitions, 289 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:17,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:17,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:17,187 INFO L124 PetriNetUnfolderBase]: 437/776 cut-off events. [2024-06-20 15:15:17,188 INFO L125 PetriNetUnfolderBase]: For 9436/9436 co-relation queries the response was YES. [2024-06-20 15:15:17,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 776 events. 437/776 cut-off events. For 9436/9436 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3689 event pairs, 174 based on Foata normal form. 18/794 useless extension candidates. Maximal degree in co-relation 2739. Up to 568 conditions per place. [2024-06-20 15:15:17,190 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 39 selfloop transitions, 5 changer transitions 18/69 dead transitions. [2024-06-20 15:15:17,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 69 transitions, 465 flow [2024-06-20 15:15:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 15:15:17,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-20 15:15:17,191 INFO L175 Difference]: Start difference. First operand has 89 places, 52 transitions, 289 flow. Second operand 9 states and 172 transitions. [2024-06-20 15:15:17,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 69 transitions, 465 flow [2024-06-20 15:15:17,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 69 transitions, 444 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:17,195 INFO L231 Difference]: Finished difference. Result has 86 places, 48 transitions, 257 flow [2024-06-20 15:15:17,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=86, PETRI_TRANSITIONS=48} [2024-06-20 15:15:17,196 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-20 15:15:17,196 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 48 transitions, 257 flow [2024-06-20 15:15:17,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:17,196 INFO 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] [2024-06-20 15:15:17,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:15:17,196 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:17,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2091878547, now seen corresponding path program 19 times [2024-06-20 15:15:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252003495] [2024-06-20 15:15:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252003495] [2024-06-20 15:15:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252003495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:17,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:17,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:17,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412316864] [2024-06-20 15:15:17,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:17,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:17,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:17,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:17,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 48 transitions, 257 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:17,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:17,457 INFO L124 PetriNetUnfolderBase]: 394/699 cut-off events. [2024-06-20 15:15:17,457 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2024-06-20 15:15:17,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 699 events. 394/699 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3228 event pairs, 145 based on Foata normal form. 24/723 useless extension candidates. Maximal degree in co-relation 2353. Up to 422 conditions per place. [2024-06-20 15:15:17,459 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 33 selfloop transitions, 3 changer transitions 25/68 dead transitions. [2024-06-20 15:15:17,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 68 transitions, 455 flow [2024-06-20 15:15:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 15:15:17,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985754985754986 [2024-06-20 15:15:17,460 INFO L175 Difference]: Start difference. First operand has 86 places, 48 transitions, 257 flow. Second operand 9 states and 175 transitions. [2024-06-20 15:15:17,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 68 transitions, 455 flow [2024-06-20 15:15:17,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 439 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:17,464 INFO L231 Difference]: Finished difference. Result has 79 places, 41 transitions, 205 flow [2024-06-20 15:15:17,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=79, PETRI_TRANSITIONS=41} [2024-06-20 15:15:17,464 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-06-20 15:15:17,464 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 41 transitions, 205 flow [2024-06-20 15:15:17,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:17,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:17,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:15:17,464 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:17,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:17,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1683908181, now seen corresponding path program 20 times [2024-06-20 15:15:17,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:17,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988962900] [2024-06-20 15:15:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:17,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:17,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988962900] [2024-06-20 15:15:17,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988962900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:17,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:17,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:15:17,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478078426] [2024-06-20 15:15:17,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:17,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:15:17,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:17,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:15:17,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:15:17,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:17,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 41 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:17,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:17,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:17,704 INFO L124 PetriNetUnfolderBase]: 393/709 cut-off events. [2024-06-20 15:15:17,704 INFO L125 PetriNetUnfolderBase]: For 8652/8652 co-relation queries the response was YES. [2024-06-20 15:15:17,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 709 events. 393/709 cut-off events. For 8652/8652 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3381 event pairs, 71 based on Foata normal form. 18/726 useless extension candidates. Maximal degree in co-relation 2576. Up to 204 conditions per place. [2024-06-20 15:15:17,706 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 39 selfloop transitions, 12 changer transitions 13/71 dead transitions. [2024-06-20 15:15:17,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 469 flow [2024-06-20 15:15:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-20 15:15:17,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-20 15:15:17,707 INFO L175 Difference]: Start difference. First operand has 79 places, 41 transitions, 205 flow. Second operand 10 states and 200 transitions. [2024-06-20 15:15:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 469 flow [2024-06-20 15:15:17,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 441 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:17,710 INFO L231 Difference]: Finished difference. Result has 71 places, 38 transitions, 196 flow [2024-06-20 15:15:17,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=38} [2024-06-20 15:15:17,711 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2024-06-20 15:15:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 38 transitions, 196 flow [2024-06-20 15:15:17,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:17,711 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] [2024-06-20 15:15:17,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:15:17,711 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:17,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1404189357, now seen corresponding path program 21 times [2024-06-20 15:15:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:17,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398875616] [2024-06-20 15:15:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:17,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398875616] [2024-06-20 15:15:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398875616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:17,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303056119] [2024-06-20 15:15:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:17,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:17,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 38 transitions, 196 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:17,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:17,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:17,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,017 INFO L124 PetriNetUnfolderBase]: 450/813 cut-off events. [2024-06-20 15:15:18,017 INFO L125 PetriNetUnfolderBase]: For 7120/7120 co-relation queries the response was YES. [2024-06-20 15:15:18,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3033 conditions, 813 events. 450/813 cut-off events. For 7120/7120 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4097 event pairs, 110 based on Foata normal form. 18/831 useless extension candidates. Maximal degree in co-relation 3005. Up to 387 conditions per place. [2024-06-20 15:15:18,020 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 41 selfloop transitions, 12 changer transitions 12/72 dead transitions. [2024-06-20 15:15:18,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 467 flow [2024-06-20 15:15:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-20 15:15:18,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2024-06-20 15:15:18,021 INFO L175 Difference]: Start difference. First operand has 71 places, 38 transitions, 196 flow. Second operand 12 states and 233 transitions. [2024-06-20 15:15:18,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 467 flow [2024-06-20 15:15:18,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 423 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:18,025 INFO L231 Difference]: Finished difference. Result has 70 places, 37 transitions, 190 flow [2024-06-20 15:15:18,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=190, PETRI_PLACES=70, PETRI_TRANSITIONS=37} [2024-06-20 15:15:18,025 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-06-20 15:15:18,025 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 37 transitions, 190 flow [2024-06-20 15:15:18,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:18,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:18,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:15:18,026 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:18,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash 878632425, now seen corresponding path program 22 times [2024-06-20 15:15:18,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:18,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910325764] [2024-06-20 15:15:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:18,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:18,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:18,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910325764] [2024-06-20 15:15:18,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910325764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:18,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:18,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:18,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410612333] [2024-06-20 15:15:18,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:18,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:18,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:18,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 37 transitions, 190 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:18,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:18,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,311 INFO L124 PetriNetUnfolderBase]: 426/781 cut-off events. [2024-06-20 15:15:18,312 INFO L125 PetriNetUnfolderBase]: For 5076/5076 co-relation queries the response was YES. [2024-06-20 15:15:18,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 781 events. 426/781 cut-off events. For 5076/5076 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4014 event pairs, 82 based on Foata normal form. 18/799 useless extension candidates. Maximal degree in co-relation 2747. Up to 351 conditions per place. [2024-06-20 15:15:18,315 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 40 selfloop transitions, 11 changer transitions 8/66 dead transitions. [2024-06-20 15:15:18,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 416 flow [2024-06-20 15:15:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 15:15:18,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-20 15:15:18,320 INFO L175 Difference]: Start difference. First operand has 70 places, 37 transitions, 190 flow. Second operand 11 states and 213 transitions. [2024-06-20 15:15:18,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 416 flow [2024-06-20 15:15:18,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 387 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:18,323 INFO L231 Difference]: Finished difference. Result has 69 places, 35 transitions, 178 flow [2024-06-20 15:15:18,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=178, PETRI_PLACES=69, PETRI_TRANSITIONS=35} [2024-06-20 15:15:18,323 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2024-06-20 15:15:18,323 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 35 transitions, 178 flow [2024-06-20 15:15:18,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:18,323 INFO 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] [2024-06-20 15:15:18,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:15:18,324 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:18,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1559041631, now seen corresponding path program 23 times [2024-06-20 15:15:18,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:18,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746781893] [2024-06-20 15:15:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:18,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746781893] [2024-06-20 15:15:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746781893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:18,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:18,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249343667] [2024-06-20 15:15:18,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:18,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:18,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:18,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 35 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:18,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:18,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,573 INFO L124 PetriNetUnfolderBase]: 321/590 cut-off events. [2024-06-20 15:15:18,573 INFO L125 PetriNetUnfolderBase]: For 3306/3306 co-relation queries the response was YES. [2024-06-20 15:15:18,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 590 events. 321/590 cut-off events. For 3306/3306 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2763 event pairs, 106 based on Foata normal form. 18/608 useless extension candidates. Maximal degree in co-relation 2017. Up to 375 conditions per place. [2024-06-20 15:15:18,575 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 24 selfloop transitions, 6 changer transitions 16/53 dead transitions. [2024-06-20 15:15:18,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 53 transitions, 320 flow [2024-06-20 15:15:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 15:15:18,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002849002849 [2024-06-20 15:15:18,576 INFO L175 Difference]: Start difference. First operand has 69 places, 35 transitions, 178 flow. Second operand 9 states and 172 transitions. [2024-06-20 15:15:18,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 53 transitions, 320 flow [2024-06-20 15:15:18,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 289 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:18,578 INFO L231 Difference]: Finished difference. Result has 65 places, 31 transitions, 141 flow [2024-06-20 15:15:18,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=141, PETRI_PLACES=65, PETRI_TRANSITIONS=31} [2024-06-20 15:15:18,578 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2024-06-20 15:15:18,578 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 31 transitions, 141 flow [2024-06-20 15:15:18,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:18,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:15:18,578 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:18,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1536091191, now seen corresponding path program 24 times [2024-06-20 15:15:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:18,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037718141] [2024-06-20 15:15:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:18,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037718141] [2024-06-20 15:15:18,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037718141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:18,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:18,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:18,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241744777] [2024-06-20 15:15:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:18,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:18,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:18,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:18,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:18,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 31 transitions, 141 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:18,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:18,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,812 INFO L124 PetriNetUnfolderBase]: 208/395 cut-off events. [2024-06-20 15:15:18,812 INFO L125 PetriNetUnfolderBase]: For 1790/1790 co-relation queries the response was YES. [2024-06-20 15:15:18,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 395 events. 208/395 cut-off events. For 1790/1790 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1641 event pairs, 12 based on Foata normal form. 18/413 useless extension candidates. Maximal degree in co-relation 1227. Up to 147 conditions per place. [2024-06-20 15:15:18,813 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 25 selfloop transitions, 6 changer transitions 17/55 dead transitions. [2024-06-20 15:15:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 311 flow [2024-06-20 15:15:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-20 15:15:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731934731934732 [2024-06-20 15:15:18,814 INFO L175 Difference]: Start difference. First operand has 65 places, 31 transitions, 141 flow. Second operand 11 states and 203 transitions. [2024-06-20 15:15:18,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 311 flow [2024-06-20 15:15:18,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 297 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:18,815 INFO L231 Difference]: Finished difference. Result has 63 places, 28 transitions, 126 flow [2024-06-20 15:15:18,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=126, PETRI_PLACES=63, PETRI_TRANSITIONS=28} [2024-06-20 15:15:18,815 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2024-06-20 15:15:18,815 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 28 transitions, 126 flow [2024-06-20 15:15:18,815 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) [2024-06-20 15:15:18,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:18,815 INFO 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] [2024-06-20 15:15:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:15:18,816 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:15:18,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1539815841, now seen corresponding path program 25 times [2024-06-20 15:15:18,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:18,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868040906] [2024-06-20 15:15:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868040906] [2024-06-20 15:15:18,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868040906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:18,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:18,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:18,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106509093] [2024-06-20 15:15:18,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:18,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:18,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:18,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-20 15:15:18,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 28 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:18,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-20 15:15:18,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:19,079 INFO L124 PetriNetUnfolderBase]: 83/176 cut-off events. [2024-06-20 15:15:19,079 INFO L125 PetriNetUnfolderBase]: For 852/852 co-relation queries the response was YES. [2024-06-20 15:15:19,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 176 events. 83/176 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 514 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 501. Up to 96 conditions per place. [2024-06-20 15:15:19,080 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-20 15:15:19,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 198 flow [2024-06-20 15:15:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 15:15:19,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-06-20 15:15:19,080 INFO L175 Difference]: Start difference. First operand has 63 places, 28 transitions, 126 flow. Second operand 9 states and 159 transitions. [2024-06-20 15:15:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 198 flow [2024-06-20 15:15:19,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 171 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-20 15:15:19,081 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-20 15:15:19,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-20 15:15:19,081 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-06-20 15:15:19,081 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-20 15:15:19,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:19,083 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-20 15:15:19,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-20 15:15:19,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-20 15:15:19,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-20 15:15:19,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-20 15:15:19,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-20 15:15:19,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:15:19,085 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:19,087 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 15:15:19,087 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 15:15:19,089 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-20 15:15:19,089 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-20 15:15:19,090 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 03:15:19 BasicIcfg [2024-06-20 15:15:19,090 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 15:15:19,090 INFO L158 Benchmark]: Toolchain (without parser) took 76539.22ms. Allocated memory was 172.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 94.9MB in the beginning and 1.0GB in the end (delta: -915.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-06-20 15:15:19,090 INFO L158 Benchmark]: CDTParser took 0.79ms. Allocated memory is still 121.6MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:15:19,090 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 172.0MB. Free memory is still 98.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:15:19,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.67ms. Allocated memory is still 172.0MB. Free memory was 94.9MB in the beginning and 67.6MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-20 15:15:19,104 INFO L158 Benchmark]: Boogie Procedure Inliner took 106.03ms. Allocated memory is still 172.0MB. Free memory was 67.6MB in the beginning and 140.2MB in the end (delta: -72.6MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2024-06-20 15:15:19,104 INFO L158 Benchmark]: Boogie Preprocessor took 41.55ms. Allocated memory is still 172.0MB. Free memory was 140.2MB in the beginning and 137.8MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:15:19,104 INFO L158 Benchmark]: RCFGBuilder took 366.55ms. Allocated memory is still 172.0MB. Free memory was 137.8MB in the beginning and 110.0MB in the end (delta: 27.9MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-20 15:15:19,104 INFO L158 Benchmark]: TraceAbstraction took 75489.48ms. Allocated memory was 172.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 109.3MB in the beginning and 1.0GB in the end (delta: -901.1MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-06-20 15:15:19,105 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79ms. Allocated memory is still 121.6MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 172.0MB. Free memory is still 98.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 530.67ms. Allocated memory is still 172.0MB. Free memory was 94.9MB in the beginning and 67.6MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 106.03ms. Allocated memory is still 172.0MB. Free memory was 67.6MB in the beginning and 140.2MB in the end (delta: -72.6MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.55ms. Allocated memory is still 172.0MB. Free memory was 140.2MB in the beginning and 137.8MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 366.55ms. Allocated memory is still 172.0MB. Free memory was 137.8MB in the beginning and 110.0MB in the end (delta: 27.9MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 75489.48ms. Allocated memory was 172.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 109.3MB in the beginning and 1.0GB in the end (delta: -901.1MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 75.4s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 62.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9297 SdHoareTripleChecker+Valid, 13.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7596 mSDsluCounter, 2792 SdHoareTripleChecker+Invalid, 11.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1861 mSDsCounter, 1365 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33385 IncrementalHoareTripleChecker+Invalid, 34750 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1365 mSolverCounterUnsat, 931 mSDtfsCounter, 33385 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 999 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2218occurred in iteration=62, InterpolantAutomatonStates: 1055, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 2438 NumberOfCodeBlocks, 2438 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2305 ConstructedInterpolants, 0 QuantifiedInterpolants, 21757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 15:15:19,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE