./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/protection/safe028_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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:47:11,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:47:11,161 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:47:11,165 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:47:11,166 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:47:11,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:47:11,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:47:11,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:47:11,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:47:11,197 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:47:11,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:47:11,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:47:11,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:47:11,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:47:11,200 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:47:11,200 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:47:11,200 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:47:11,200 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:47:11,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:47:11,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:47:11,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:47:11,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:47:11,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:47:11,203 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:47:11,203 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:47:11,203 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:47:11,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:47:11,204 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:47:11,204 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:47:11,204 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:47:11,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:47:11,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:47:11,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:47:11,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:47:11,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:47:11,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:47:11,206 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:47:11,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:47:11,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:47:11,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:47:11,207 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:47:11,207 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:47:11,207 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:47:11,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:47:11,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:47:11,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:47:11,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:47:11,459 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:47:11,461 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:47:11,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 12:47:11,593 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:47:11,593 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:47:11,594 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:47:12,642 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:47:12,844 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:47:12,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:47:12,856 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d760d182/b2399be077dd4fcea8fb13cdebb0b849/FLAGe3f75f231 [2024-05-12 12:47:12,867 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d760d182/b2399be077dd4fcea8fb13cdebb0b849 [2024-05-12 12:47:12,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:47:12,869 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:47:12,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:47:12,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:47:12,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:47:12,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:11" (1/2) ... [2024-05-12 12:47:12,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331e869 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:12, skipping insertion in model container [2024-05-12 12:47:12,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:11" (1/2) ... [2024-05-12 12:47:12,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d7fbd11 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:12, skipping insertion in model container [2024-05-12 12:47:12,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:47:12" (2/2) ... [2024-05-12 12:47:12,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331e869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:12, skipping insertion in model container [2024-05-12 12:47:12,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:47:12" (2/2) ... [2024-05-12 12:47:12,877 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:47:12,909 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:47:12,910 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-05-12 12:47:12,910 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-05-12 12:47:12,910 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-05-12 12:47:12,910 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:47:12,910 INFO L106 edCorrectnessWitness]: ghost_update [L778-L778] multithreaded = 1; [2024-05-12 12:47:12,947 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:47:13,084 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-05-12 12:47:13,186 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:47:13,194 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:47:13,226 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:47:13,270 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:47:13,299 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:47:13,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13 WrapperNode [2024-05-12 12:47:13,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:47:13,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:47:13,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:47:13,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:47:13,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,339 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 12:47:13,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:47:13,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:47:13,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:47:13,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:47:13,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,359 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 12:47:13,359 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,367 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,370 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:47:13,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:47:13,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:47:13,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:47:13,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (1/1) ... [2024-05-12 12:47:13,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:47:13,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:47:13,393 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) [2024-05-12 12:47:13,397 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 [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:47:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:47:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:47:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:47:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:47:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:47:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:47:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 12:47:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 12:47:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:47:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:47:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:47:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:47:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:47:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:47:13,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:47:13,421 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:47:13,523 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:47:13,525 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:47:13,754 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:47:13,755 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:47:13,829 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:47:13,829 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:47:13,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:47:13 BoogieIcfgContainer [2024-05-12 12:47:13,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:47:13,835 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:47:13,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:47:13,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:47:13,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:11" (1/4) ... [2024-05-12 12:47:13,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b3aa92 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:47:13, skipping insertion in model container [2024-05-12 12:47:13,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:47:12" (2/4) ... [2024-05-12 12:47:13,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b3aa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:47:13, skipping insertion in model container [2024-05-12 12:47:13,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:13" (3/4) ... [2024-05-12 12:47:13,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b3aa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:47:13, skipping insertion in model container [2024-05-12 12:47:13,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:47:13" (4/4) ... [2024-05-12 12:47:13,842 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:47:13,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:47:13,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 12:47:13,855 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:47:13,903 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:47:13,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 12:47:13,963 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 12:47:13,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:47:13,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 12:47:13,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 12:47:13,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 12:47:13,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:47:13,982 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;@414669ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:47:13,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 12:47:13,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:47:13,986 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:47:13,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:47:13,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:13,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:47:13,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:13,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1820360577, now seen corresponding path program 1 times [2024-05-12 12:47:14,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179395159] [2024-05-12 12:47:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:14,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:14,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179395159] [2024-05-12 12:47:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179395159] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:14,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:14,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:47:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480550462] [2024-05-12 12:47:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:14,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:47:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:47:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:47:14,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-05-12 12:47:14,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:14,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:14,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-05-12 12:47:14,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:14,673 INFO L124 PetriNetUnfolderBase]: 575/960 cut-off events. [2024-05-12 12:47:14,676 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-05-12 12:47:14,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1902 conditions, 960 events. 575/960 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4908 event pairs, 303 based on Foata normal form. 1/923 useless extension candidates. Maximal degree in co-relation 1887. Up to 883 conditions per place. [2024-05-12 12:47:14,685 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 32 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 12:47:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 191 flow [2024-05-12 12:47:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:47:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:47:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-05-12 12:47:14,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2024-05-12 12:47:14,696 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 99 transitions. [2024-05-12 12:47:14,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 191 flow [2024-05-12 12:47:14,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:14,701 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 12:47:14,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 12:47:14,706 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 12:47:14,706 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 12:47:14,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:14,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:14,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:14,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:47:14,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:14,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1314779042, now seen corresponding path program 1 times [2024-05-12 12:47:14,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:14,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141816590] [2024-05-12 12:47:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:14,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:14,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:14,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141816590] [2024-05-12 12:47:14,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141816590] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:14,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:14,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:47:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076608652] [2024-05-12 12:47:14,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:47:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:47:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:47:14,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-05-12 12:47:14,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:14,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:14,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-05-12 12:47:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:15,198 INFO L124 PetriNetUnfolderBase]: 750/1290 cut-off events. [2024-05-12 12:47:15,199 INFO L125 PetriNetUnfolderBase]: For 266/296 co-relation queries the response was YES. [2024-05-12 12:47:15,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2855 conditions, 1290 events. 750/1290 cut-off events. For 266/296 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7028 event pairs, 355 based on Foata normal form. 3/1274 useless extension candidates. Maximal degree in co-relation 2840. Up to 1115 conditions per place. [2024-05-12 12:47:15,207 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 45 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-05-12 12:47:15,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 284 flow [2024-05-12 12:47:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-05-12 12:47:15,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-05-12 12:47:15,214 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 128 transitions. [2024-05-12 12:47:15,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 284 flow [2024-05-12 12:47:15,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:15,218 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-05-12 12:47:15,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-05-12 12:47:15,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-05-12 12:47:15,222 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-05-12 12:47:15,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:15,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:15,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:15,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:47:15,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:15,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash 391742705, now seen corresponding path program 1 times [2024-05-12 12:47:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:15,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643437221] [2024-05-12 12:47:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:15,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643437221] [2024-05-12 12:47:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643437221] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:15,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:15,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:47:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943867522] [2024-05-12 12:47:15,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:47:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:15,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:47:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:47:15,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:15,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:15,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:15,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:15,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:15,568 INFO L124 PetriNetUnfolderBase]: 995/1666 cut-off events. [2024-05-12 12:47:15,568 INFO L125 PetriNetUnfolderBase]: For 801/826 co-relation queries the response was YES. [2024-05-12 12:47:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 1666 events. 995/1666 cut-off events. For 801/826 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9443 event pairs, 464 based on Foata normal form. 2/1643 useless extension candidates. Maximal degree in co-relation 4110. Up to 1475 conditions per place. [2024-05-12 12:47:15,577 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 47 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-05-12 12:47:15,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 337 flow [2024-05-12 12:47:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-05-12 12:47:15,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-05-12 12:47:15,581 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 4 states and 121 transitions. [2024-05-12 12:47:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 337 flow [2024-05-12 12:47:15,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 335 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 12:47:15,585 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 227 flow [2024-05-12 12:47:15,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-05-12 12:47:15,586 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-05-12 12:47:15,586 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 227 flow [2024-05-12 12:47:15,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:15,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:15,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:15,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:47:15,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:15,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:15,587 INFO L85 PathProgramCache]: Analyzing trace with hash -100215780, now seen corresponding path program 1 times [2024-05-12 12:47:15,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431927543] [2024-05-12 12:47:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431927543] [2024-05-12 12:47:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431927543] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:15,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:15,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150118501] [2024-05-12 12:47:15,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:15,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:15,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:15,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:15,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:15,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:15,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:15,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:16,112 INFO L124 PetriNetUnfolderBase]: 1132/1965 cut-off events. [2024-05-12 12:47:16,113 INFO L125 PetriNetUnfolderBase]: For 1569/1575 co-relation queries the response was YES. [2024-05-12 12:47:16,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5135 conditions, 1965 events. 1132/1965 cut-off events. For 1569/1575 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11489 event pairs, 383 based on Foata normal form. 12/1962 useless extension candidates. Maximal degree in co-relation 5113. Up to 1592 conditions per place. [2024-05-12 12:47:16,123 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-05-12 12:47:16,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 93 transitions, 479 flow [2024-05-12 12:47:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 12:47:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-05-12 12:47:16,125 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 227 flow. Second operand 6 states and 181 transitions. [2024-05-12 12:47:16,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 93 transitions, 479 flow [2024-05-12 12:47:16,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 477 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 12:47:16,127 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 287 flow [2024-05-12 12:47:16,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-05-12 12:47:16,128 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-05-12 12:47:16,128 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 287 flow [2024-05-12 12:47:16,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:16,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:16,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:16,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:47:16,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:16,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1492584270, now seen corresponding path program 1 times [2024-05-12 12:47:16,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:16,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246178706] [2024-05-12 12:47:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:16,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246178706] [2024-05-12 12:47:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246178706] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813509521] [2024-05-12 12:47:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:16,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:16,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:16,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:16,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:16,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:16,481 INFO L124 PetriNetUnfolderBase]: 1184/2015 cut-off events. [2024-05-12 12:47:16,482 INFO L125 PetriNetUnfolderBase]: For 2437/2437 co-relation queries the response was YES. [2024-05-12 12:47:16,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 2015 events. 1184/2015 cut-off events. For 2437/2437 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11343 event pairs, 445 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 5818. Up to 1699 conditions per place. [2024-05-12 12:47:16,494 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 66 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-05-12 12:47:16,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 562 flow [2024-05-12 12:47:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-05-12 12:47:16,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:47:16,496 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 287 flow. Second operand 5 states and 150 transitions. [2024-05-12 12:47:16,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 562 flow [2024-05-12 12:47:16,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 93 transitions, 531 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:16,499 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 346 flow [2024-05-12 12:47:16,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-05-12 12:47:16,500 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2024-05-12 12:47:16,500 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 346 flow [2024-05-12 12:47:16,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:16,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:16,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:16,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:47:16,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:16,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash -861835020, now seen corresponding path program 2 times [2024-05-12 12:47:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:16,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860229928] [2024-05-12 12:47:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:16,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860229928] [2024-05-12 12:47:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860229928] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:16,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328627218] [2024-05-12 12:47:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:16,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:16,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:16,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:16,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:16,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:16,840 INFO L124 PetriNetUnfolderBase]: 1179/1914 cut-off events. [2024-05-12 12:47:16,840 INFO L125 PetriNetUnfolderBase]: For 3256/3256 co-relation queries the response was YES. [2024-05-12 12:47:16,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6135 conditions, 1914 events. 1179/1914 cut-off events. For 3256/3256 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10535 event pairs, 374 based on Foata normal form. 2/1913 useless extension candidates. Maximal degree in co-relation 6107. Up to 1694 conditions per place. [2024-05-12 12:47:16,852 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 61 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-05-12 12:47:16,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 555 flow [2024-05-12 12:47:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-05-12 12:47:16,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:47:16,854 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 346 flow. Second operand 5 states and 145 transitions. [2024-05-12 12:47:16,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 555 flow [2024-05-12 12:47:16,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 529 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:16,861 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 365 flow [2024-05-12 12:47:16,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-05-12 12:47:16,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-05-12 12:47:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 365 flow [2024-05-12 12:47:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:16,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:16,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:47:16,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:16,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1492338192, now seen corresponding path program 1 times [2024-05-12 12:47:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164796750] [2024-05-12 12:47:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164796750] [2024-05-12 12:47:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164796750] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:17,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:17,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:17,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592096999] [2024-05-12 12:47:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:17,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:17,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:17,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:17,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:17,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:17,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:17,238 INFO L124 PetriNetUnfolderBase]: 1024/1777 cut-off events. [2024-05-12 12:47:17,238 INFO L125 PetriNetUnfolderBase]: For 3731/3731 co-relation queries the response was YES. [2024-05-12 12:47:17,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5681 conditions, 1777 events. 1024/1777 cut-off events. For 3731/3731 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10178 event pairs, 304 based on Foata normal form. 4/1778 useless extension candidates. Maximal degree in co-relation 5652. Up to 1462 conditions per place. [2024-05-12 12:47:17,253 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 65 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-05-12 12:47:17,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 92 transitions, 575 flow [2024-05-12 12:47:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 12:47:17,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-05-12 12:47:17,254 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 365 flow. Second operand 5 states and 147 transitions. [2024-05-12 12:47:17,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 92 transitions, 575 flow [2024-05-12 12:47:17,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:17,260 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 382 flow [2024-05-12 12:47:17,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-05-12 12:47:17,261 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2024-05-12 12:47:17,261 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 382 flow [2024-05-12 12:47:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:17,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:17,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:17,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:47:17,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:17,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1742518993, now seen corresponding path program 1 times [2024-05-12 12:47:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:17,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247663804] [2024-05-12 12:47:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:17,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:17,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247663804] [2024-05-12 12:47:17,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247663804] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:17,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:17,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255099433] [2024-05-12 12:47:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:17,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:17,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:17,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:17,741 INFO L124 PetriNetUnfolderBase]: 1199/2097 cut-off events. [2024-05-12 12:47:17,741 INFO L125 PetriNetUnfolderBase]: For 4826/4826 co-relation queries the response was YES. [2024-05-12 12:47:17,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6657 conditions, 2097 events. 1199/2097 cut-off events. For 4826/4826 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12330 event pairs, 470 based on Foata normal form. 3/2078 useless extension candidates. Maximal degree in co-relation 6626. Up to 1692 conditions per place. [2024-05-12 12:47:17,751 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 77 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-05-12 12:47:17,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 680 flow [2024-05-12 12:47:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 12:47:17,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-05-12 12:47:17,752 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 382 flow. Second operand 6 states and 179 transitions. [2024-05-12 12:47:17,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 680 flow [2024-05-12 12:47:17,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 659 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:17,757 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 436 flow [2024-05-12 12:47:17,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-05-12 12:47:17,758 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2024-05-12 12:47:17,758 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 436 flow [2024-05-12 12:47:17,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:17,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:17,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:17,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:47:17,758 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:17,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1737757393, now seen corresponding path program 2 times [2024-05-12 12:47:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:17,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581626753] [2024-05-12 12:47:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:17,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581626753] [2024-05-12 12:47:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581626753] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500609743] [2024-05-12 12:47:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:17,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 436 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:17,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:17,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:17,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:18,113 INFO L124 PetriNetUnfolderBase]: 1216/2059 cut-off events. [2024-05-12 12:47:18,114 INFO L125 PetriNetUnfolderBase]: For 5851/5851 co-relation queries the response was YES. [2024-05-12 12:47:18,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7217 conditions, 2059 events. 1216/2059 cut-off events. For 5851/5851 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11678 event pairs, 410 based on Foata normal form. 2/2057 useless extension candidates. Maximal degree in co-relation 7185. Up to 1685 conditions per place. [2024-05-12 12:47:18,126 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 79 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-05-12 12:47:18,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 827 flow [2024-05-12 12:47:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 12:47:18,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 12:47:18,127 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 436 flow. Second operand 6 states and 178 transitions. [2024-05-12 12:47:18,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 827 flow [2024-05-12 12:47:18,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 116 transitions, 771 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:18,138 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 546 flow [2024-05-12 12:47:18,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-05-12 12:47:18,139 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-05-12 12:47:18,139 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 546 flow [2024-05-12 12:47:18,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:18,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:18,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:18,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:47:18,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:18,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -349839779, now seen corresponding path program 1 times [2024-05-12 12:47:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:18,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107435608] [2024-05-12 12:47:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:18,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107435608] [2024-05-12 12:47:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107435608] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:18,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:18,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476609609] [2024-05-12 12:47:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:18,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:18,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:18,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:18,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 546 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:18,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:18,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:18,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:18,506 INFO L124 PetriNetUnfolderBase]: 1243/2126 cut-off events. [2024-05-12 12:47:18,506 INFO L125 PetriNetUnfolderBase]: For 7741/7741 co-relation queries the response was YES. [2024-05-12 12:47:18,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7890 conditions, 2126 events. 1243/2126 cut-off events. For 7741/7741 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12015 event pairs, 404 based on Foata normal form. 4/2125 useless extension candidates. Maximal degree in co-relation 7855. Up to 1760 conditions per place. [2024-05-12 12:47:18,519 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 87 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-05-12 12:47:18,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 844 flow [2024-05-12 12:47:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 12:47:18,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:47:18,520 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 546 flow. Second operand 6 states and 174 transitions. [2024-05-12 12:47:18,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 844 flow [2024-05-12 12:47:18,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 822 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:18,529 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 585 flow [2024-05-12 12:47:18,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2024-05-12 12:47:18,530 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2024-05-12 12:47:18,530 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 585 flow [2024-05-12 12:47:18,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:18,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:18,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:18,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:47:18,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:18,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2119724163, now seen corresponding path program 3 times [2024-05-12 12:47:18,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:18,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733193203] [2024-05-12 12:47:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:18,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:18,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:18,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733193203] [2024-05-12 12:47:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733193203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:18,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415032326] [2024-05-12 12:47:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:18,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:18,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:18,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 585 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:18,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:18,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:18,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:18,898 INFO L124 PetriNetUnfolderBase]: 1238/2024 cut-off events. [2024-05-12 12:47:18,899 INFO L125 PetriNetUnfolderBase]: For 8764/8764 co-relation queries the response was YES. [2024-05-12 12:47:18,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8073 conditions, 2024 events. 1238/2024 cut-off events. For 8764/8764 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11275 event pairs, 346 based on Foata normal form. 2/2022 useless extension candidates. Maximal degree in co-relation 8036. Up to 1721 conditions per place. [2024-05-12 12:47:18,912 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 76 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-05-12 12:47:18,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 114 transitions, 862 flow [2024-05-12 12:47:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 12:47:18,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-05-12 12:47:18,913 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 585 flow. Second operand 6 states and 173 transitions. [2024-05-12 12:47:18,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 114 transitions, 862 flow [2024-05-12 12:47:18,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 805 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:18,922 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 597 flow [2024-05-12 12:47:18,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=597, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-05-12 12:47:18,923 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-05-12 12:47:18,923 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 597 flow [2024-05-12 12:47:18,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:18,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:18,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:18,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:47:18,923 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:18,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 381813105, now seen corresponding path program 2 times [2024-05-12 12:47:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920013122] [2024-05-12 12:47:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:19,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920013122] [2024-05-12 12:47:19,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920013122] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:19,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:19,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738339754] [2024-05-12 12:47:19,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:19,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:19,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:19,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 597 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:19,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:19,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:19,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:19,344 INFO L124 PetriNetUnfolderBase]: 1265/2087 cut-off events. [2024-05-12 12:47:19,345 INFO L125 PetriNetUnfolderBase]: For 10010/10010 co-relation queries the response was YES. [2024-05-12 12:47:19,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 2087 events. 1265/2087 cut-off events. For 10010/10010 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11724 event pairs, 370 based on Foata normal form. 4/2085 useless extension candidates. Maximal degree in co-relation 8281. Up to 1794 conditions per place. [2024-05-12 12:47:19,360 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 87 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-05-12 12:47:19,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 117 transitions, 891 flow [2024-05-12 12:47:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 12:47:19,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 12:47:19,362 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 597 flow. Second operand 6 states and 171 transitions. [2024-05-12 12:47:19,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 117 transitions, 891 flow [2024-05-12 12:47:19,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 847 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:19,374 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 618 flow [2024-05-12 12:47:19,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2024-05-12 12:47:19,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2024-05-12 12:47:19,376 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 618 flow [2024-05-12 12:47:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:19,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:47:19,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:19,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash 382109775, now seen corresponding path program 3 times [2024-05-12 12:47:19,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:19,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335963094] [2024-05-12 12:47:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:19,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:19,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:19,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335963094] [2024-05-12 12:47:19,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335963094] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:19,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:19,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348491517] [2024-05-12 12:47:19,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:19,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:19,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:19,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:19,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:19,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:19,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:19,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:19,815 INFO L124 PetriNetUnfolderBase]: 1257/2130 cut-off events. [2024-05-12 12:47:19,815 INFO L125 PetriNetUnfolderBase]: For 11576/11576 co-relation queries the response was YES. [2024-05-12 12:47:19,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8496 conditions, 2130 events. 1257/2130 cut-off events. For 11576/11576 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12257 event pairs, 465 based on Foata normal form. 4/2113 useless extension candidates. Maximal degree in co-relation 8456. Up to 1697 conditions per place. [2024-05-12 12:47:19,830 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 85 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-05-12 12:47:19,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 924 flow [2024-05-12 12:47:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 12:47:19,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 12:47:19,831 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 618 flow. Second operand 6 states and 172 transitions. [2024-05-12 12:47:19,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 924 flow [2024-05-12 12:47:19,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 120 transitions, 877 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:19,845 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 650 flow [2024-05-12 12:47:19,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=650, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2024-05-12 12:47:19,846 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-05-12 12:47:19,846 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 650 flow [2024-05-12 12:47:19,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:19,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:19,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:19,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:47:19,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:19,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash 9693096, now seen corresponding path program 1 times [2024-05-12 12:47:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:19,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271706285] [2024-05-12 12:47:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:19,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271706285] [2024-05-12 12:47:19,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271706285] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:19,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936299603] [2024-05-12 12:47:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:20,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:20,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 650 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:20,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:20,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:20,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:20,190 INFO L124 PetriNetUnfolderBase]: 1152/2041 cut-off events. [2024-05-12 12:47:20,190 INFO L125 PetriNetUnfolderBase]: For 13039/13039 co-relation queries the response was YES. [2024-05-12 12:47:20,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8385 conditions, 2041 events. 1152/2041 cut-off events. For 13039/13039 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12144 event pairs, 457 based on Foata normal form. 2/2022 useless extension candidates. Maximal degree in co-relation 8344. Up to 1626 conditions per place. [2024-05-12 12:47:20,205 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 80 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2024-05-12 12:47:20,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 116 transitions, 958 flow [2024-05-12 12:47:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-05-12 12:47:20,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347826086956522 [2024-05-12 12:47:20,206 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 650 flow. Second operand 5 states and 146 transitions. [2024-05-12 12:47:20,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 116 transitions, 958 flow [2024-05-12 12:47:20,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 897 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:20,221 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 679 flow [2024-05-12 12:47:20,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=679, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2024-05-12 12:47:20,222 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2024-05-12 12:47:20,222 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 679 flow [2024-05-12 12:47:20,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:20,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:20,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:20,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:47:20,223 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:20,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1159322826, now seen corresponding path program 2 times [2024-05-12 12:47:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:20,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661918976] [2024-05-12 12:47:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:20,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:20,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661918976] [2024-05-12 12:47:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661918976] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:20,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047424719] [2024-05-12 12:47:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:20,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:20,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:20,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 679 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:20,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:20,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:20,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:20,582 INFO L124 PetriNetUnfolderBase]: 1151/2020 cut-off events. [2024-05-12 12:47:20,583 INFO L125 PetriNetUnfolderBase]: For 14168/14168 co-relation queries the response was YES. [2024-05-12 12:47:20,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8510 conditions, 2020 events. 1151/2020 cut-off events. For 14168/14168 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11915 event pairs, 444 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 8468. Up to 1634 conditions per place. [2024-05-12 12:47:20,595 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 79 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-05-12 12:47:20,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 112 transitions, 901 flow [2024-05-12 12:47:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-05-12 12:47:20,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-05-12 12:47:20,596 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 679 flow. Second operand 4 states and 121 transitions. [2024-05-12 12:47:20,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 112 transitions, 901 flow [2024-05-12 12:47:20,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 112 transitions, 873 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:20,612 INFO L231 Difference]: Finished difference. Result has 97 places, 97 transitions, 690 flow [2024-05-12 12:47:20,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=690, PETRI_PLACES=97, PETRI_TRANSITIONS=97} [2024-05-12 12:47:20,613 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-05-12 12:47:20,613 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 97 transitions, 690 flow [2024-05-12 12:47:20,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:20,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:20,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:20,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:47:20,614 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:20,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:20,614 INFO L85 PathProgramCache]: Analyzing trace with hash 473675598, now seen corresponding path program 1 times [2024-05-12 12:47:20,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:20,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633290203] [2024-05-12 12:47:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633290203] [2024-05-12 12:47:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633290203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:20,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:20,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:20,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348562148] [2024-05-12 12:47:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:20,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:20,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:20,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:20,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 97 transitions, 690 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:20,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:20,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:20,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:21,147 INFO L124 PetriNetUnfolderBase]: 1608/2689 cut-off events. [2024-05-12 12:47:21,148 INFO L125 PetriNetUnfolderBase]: For 21762/21762 co-relation queries the response was YES. [2024-05-12 12:47:21,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11528 conditions, 2689 events. 1608/2689 cut-off events. For 21762/21762 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16133 event pairs, 436 based on Foata normal form. 18/2682 useless extension candidates. Maximal degree in co-relation 11484. Up to 1859 conditions per place. [2024-05-12 12:47:21,168 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 116 selfloop transitions, 28 changer transitions 0/157 dead transitions. [2024-05-12 12:47:21,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 157 transitions, 1242 flow [2024-05-12 12:47:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:47:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:47:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-05-12 12:47:21,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-05-12 12:47:21,170 INFO L175 Difference]: Start difference. First operand has 97 places, 97 transitions, 690 flow. Second operand 8 states and 239 transitions. [2024-05-12 12:47:21,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 157 transitions, 1242 flow [2024-05-12 12:47:21,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 157 transitions, 1214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:21,194 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 799 flow [2024-05-12 12:47:21,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=799, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-05-12 12:47:21,195 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-05-12 12:47:21,195 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 799 flow [2024-05-12 12:47:21,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:21,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:47:21,195 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:21,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 476532558, now seen corresponding path program 2 times [2024-05-12 12:47:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:21,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153600030] [2024-05-12 12:47:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153600030] [2024-05-12 12:47:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153600030] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:21,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:21,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651668887] [2024-05-12 12:47:21,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:21,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:21,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:21,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:21,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:21,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 799 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:21,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:21,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:21,739 INFO L124 PetriNetUnfolderBase]: 1562/2680 cut-off events. [2024-05-12 12:47:21,740 INFO L125 PetriNetUnfolderBase]: For 22482/22482 co-relation queries the response was YES. [2024-05-12 12:47:21,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11543 conditions, 2680 events. 1562/2680 cut-off events. For 22482/22482 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16211 event pairs, 577 based on Foata normal form. 24/2678 useless extension candidates. Maximal degree in co-relation 11497. Up to 2048 conditions per place. [2024-05-12 12:47:21,766 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 110 selfloop transitions, 24 changer transitions 0/147 dead transitions. [2024-05-12 12:47:21,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 147 transitions, 1204 flow [2024-05-12 12:47:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 12:47:21,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-05-12 12:47:21,768 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 799 flow. Second operand 7 states and 208 transitions. [2024-05-12 12:47:21,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 147 transitions, 1204 flow [2024-05-12 12:47:21,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 1132 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:21,806 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 806 flow [2024-05-12 12:47:21,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=806, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2024-05-12 12:47:21,807 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 55 predicate places. [2024-05-12 12:47:21,807 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 806 flow [2024-05-12 12:47:21,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:21,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:21,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:47:21,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:21,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:21,808 INFO L85 PathProgramCache]: Analyzing trace with hash 757462862, now seen corresponding path program 3 times [2024-05-12 12:47:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:21,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408129099] [2024-05-12 12:47:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:21,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:21,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408129099] [2024-05-12 12:47:21,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408129099] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:21,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:21,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:21,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078850304] [2024-05-12 12:47:21,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:21,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:21,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 806 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:21,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:21,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:21,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:22,294 INFO L124 PetriNetUnfolderBase]: 1656/2832 cut-off events. [2024-05-12 12:47:22,295 INFO L125 PetriNetUnfolderBase]: For 23363/23363 co-relation queries the response was YES. [2024-05-12 12:47:22,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12059 conditions, 2832 events. 1656/2832 cut-off events. For 23363/23363 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17405 event pairs, 630 based on Foata normal form. 16/2820 useless extension candidates. Maximal degree in co-relation 12012. Up to 2241 conditions per place. [2024-05-12 12:47:22,315 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 106 selfloop transitions, 26 changer transitions 0/145 dead transitions. [2024-05-12 12:47:22,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 145 transitions, 1198 flow [2024-05-12 12:47:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:47:22,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 12:47:22,317 INFO L175 Difference]: Start difference. First operand has 105 places, 104 transitions, 806 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:47:22,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 145 transitions, 1198 flow [2024-05-12 12:47:22,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 145 transitions, 1154 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:22,352 INFO L231 Difference]: Finished difference. Result has 107 places, 105 transitions, 841 flow [2024-05-12 12:47:22,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=841, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2024-05-12 12:47:22,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2024-05-12 12:47:22,352 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 841 flow [2024-05-12 12:47:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:22,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:22,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:22,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:47:22,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:22,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:22,354 INFO L85 PathProgramCache]: Analyzing trace with hash 764134062, now seen corresponding path program 1 times [2024-05-12 12:47:22,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:22,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000441909] [2024-05-12 12:47:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:22,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:22,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:22,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000441909] [2024-05-12 12:47:22,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000441909] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:22,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43023611] [2024-05-12 12:47:22,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:22,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:22,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:22,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 841 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:22,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:22,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:22,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:22,882 INFO L124 PetriNetUnfolderBase]: 1723/2853 cut-off events. [2024-05-12 12:47:22,883 INFO L125 PetriNetUnfolderBase]: For 25525/25525 co-relation queries the response was YES. [2024-05-12 12:47:22,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12608 conditions, 2853 events. 1723/2853 cut-off events. For 25525/25525 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17265 event pairs, 425 based on Foata normal form. 12/2856 useless extension candidates. Maximal degree in co-relation 12560. Up to 2093 conditions per place. [2024-05-12 12:47:22,902 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 107 selfloop transitions, 29 changer transitions 0/149 dead transitions. [2024-05-12 12:47:22,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 149 transitions, 1255 flow [2024-05-12 12:47:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 12:47:22,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-05-12 12:47:22,906 INFO L175 Difference]: Start difference. First operand has 107 places, 105 transitions, 841 flow. Second operand 7 states and 206 transitions. [2024-05-12 12:47:22,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 149 transitions, 1255 flow [2024-05-12 12:47:22,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1196 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:22,941 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 868 flow [2024-05-12 12:47:22,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=868, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-05-12 12:47:22,942 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-05-12 12:47:22,942 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 868 flow [2024-05-12 12:47:22,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:22,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:22,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:22,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:47:22,942 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:22,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 93618992, now seen corresponding path program 1 times [2024-05-12 12:47:22,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:22,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510369064] [2024-05-12 12:47:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:22,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:23,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:23,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510369064] [2024-05-12 12:47:23,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510369064] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:23,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:23,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:23,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008431206] [2024-05-12 12:47:23,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:23,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:23,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:23,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 868 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:23,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:23,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:23,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:23,414 INFO L124 PetriNetUnfolderBase]: 1646/2850 cut-off events. [2024-05-12 12:47:23,414 INFO L125 PetriNetUnfolderBase]: For 25473/25479 co-relation queries the response was YES. [2024-05-12 12:47:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12364 conditions, 2850 events. 1646/2850 cut-off events. For 25473/25479 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17853 event pairs, 499 based on Foata normal form. 6/2832 useless extension candidates. Maximal degree in co-relation 12315. Up to 2353 conditions per place. [2024-05-12 12:47:23,434 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 94 selfloop transitions, 27 changer transitions 0/142 dead transitions. [2024-05-12 12:47:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 142 transitions, 1287 flow [2024-05-12 12:47:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:47:23,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:47:23,437 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 868 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:47:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 142 transitions, 1287 flow [2024-05-12 12:47:23,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 142 transitions, 1226 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:23,465 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 966 flow [2024-05-12 12:47:23,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=966, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-05-12 12:47:23,466 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-05-12 12:47:23,466 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 966 flow [2024-05-12 12:47:23,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:23,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:23,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:23,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:47:23,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:23,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash 562400490, now seen corresponding path program 4 times [2024-05-12 12:47:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:23,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678079396] [2024-05-12 12:47:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678079396] [2024-05-12 12:47:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678079396] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:23,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:23,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241527386] [2024-05-12 12:47:23,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:23,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:23,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:23,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:23,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 966 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:23,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:23,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:23,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:24,020 INFO L124 PetriNetUnfolderBase]: 1826/3001 cut-off events. [2024-05-12 12:47:24,020 INFO L125 PetriNetUnfolderBase]: For 29908/29908 co-relation queries the response was YES. [2024-05-12 12:47:24,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13518 conditions, 3001 events. 1826/3001 cut-off events. For 29908/29908 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18261 event pairs, 434 based on Foata normal form. 16/3013 useless extension candidates. Maximal degree in co-relation 13467. Up to 2507 conditions per place. [2024-05-12 12:47:24,043 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 116 selfloop transitions, 26 changer transitions 0/155 dead transitions. [2024-05-12 12:47:24,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 155 transitions, 1376 flow [2024-05-12 12:47:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:47:24,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 12:47:24,045 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 966 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:47:24,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 155 transitions, 1376 flow [2024-05-12 12:47:24,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 155 transitions, 1346 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:24,088 INFO L231 Difference]: Finished difference. Result has 118 places, 118 transitions, 1019 flow [2024-05-12 12:47:24,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1019, PETRI_PLACES=118, PETRI_TRANSITIONS=118} [2024-05-12 12:47:24,089 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-05-12 12:47:24,089 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 118 transitions, 1019 flow [2024-05-12 12:47:24,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:24,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:24,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:47:24,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:24,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash 562584940, now seen corresponding path program 2 times [2024-05-12 12:47:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:24,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686584093] [2024-05-12 12:47:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:24,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686584093] [2024-05-12 12:47:24,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686584093] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:24,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:24,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251063728] [2024-05-12 12:47:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:24,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:24,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 118 transitions, 1019 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:24,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:24,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:24,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:24,715 INFO L124 PetriNetUnfolderBase]: 1893/3241 cut-off events. [2024-05-12 12:47:24,716 INFO L125 PetriNetUnfolderBase]: For 33894/33894 co-relation queries the response was YES. [2024-05-12 12:47:24,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14453 conditions, 3241 events. 1893/3241 cut-off events. For 33894/33894 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20593 event pairs, 698 based on Foata normal form. 12/3227 useless extension candidates. Maximal degree in co-relation 14400. Up to 2491 conditions per place. [2024-05-12 12:47:24,738 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 118 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-05-12 12:47:24,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1453 flow [2024-05-12 12:47:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:47:24,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 12:47:24,740 INFO L175 Difference]: Start difference. First operand has 118 places, 118 transitions, 1019 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:47:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1453 flow [2024-05-12 12:47:24,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 159 transitions, 1390 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:24,771 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 1044 flow [2024-05-12 12:47:24,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1044, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2024-05-12 12:47:24,772 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-05-12 12:47:24,772 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 1044 flow [2024-05-12 12:47:24,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:24,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:24,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:24,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:47:24,773 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:24,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:24,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1078693566, now seen corresponding path program 3 times [2024-05-12 12:47:24,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:24,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972461418] [2024-05-12 12:47:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:24,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:24,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972461418] [2024-05-12 12:47:24,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972461418] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:24,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:24,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025336017] [2024-05-12 12:47:24,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:24,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:24,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 1044 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:24,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:24,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:24,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:25,270 INFO L124 PetriNetUnfolderBase]: 1873/3153 cut-off events. [2024-05-12 12:47:25,270 INFO L125 PetriNetUnfolderBase]: For 31939/31939 co-relation queries the response was YES. [2024-05-12 12:47:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13967 conditions, 3153 events. 1873/3153 cut-off events. For 31939/31939 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19537 event pairs, 386 based on Foata normal form. 12/3158 useless extension candidates. Maximal degree in co-relation 13913. Up to 1912 conditions per place. [2024-05-12 12:47:25,292 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 111 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-05-12 12:47:25,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 159 transitions, 1416 flow [2024-05-12 12:47:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 12:47:25,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:47:25,294 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 1044 flow. Second operand 7 states and 203 transitions. [2024-05-12 12:47:25,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 159 transitions, 1416 flow [2024-05-12 12:47:25,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 159 transitions, 1344 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:25,333 INFO L231 Difference]: Finished difference. Result has 121 places, 118 transitions, 1006 flow [2024-05-12 12:47:25,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1006, PETRI_PLACES=121, PETRI_TRANSITIONS=118} [2024-05-12 12:47:25,333 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-05-12 12:47:25,333 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 118 transitions, 1006 flow [2024-05-12 12:47:25,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:25,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:25,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:25,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:47:25,334 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:25,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash 103808072, now seen corresponding path program 2 times [2024-05-12 12:47:25,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:25,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595751826] [2024-05-12 12:47:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:25,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:25,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595751826] [2024-05-12 12:47:25,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595751826] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:25,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:25,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:25,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667061318] [2024-05-12 12:47:25,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:25,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:25,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:25,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:25,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:25,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:25,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 118 transitions, 1006 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:25,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:25,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:25,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:25,792 INFO L124 PetriNetUnfolderBase]: 1759/2994 cut-off events. [2024-05-12 12:47:25,793 INFO L125 PetriNetUnfolderBase]: For 30403/30407 co-relation queries the response was YES. [2024-05-12 12:47:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13377 conditions, 2994 events. 1759/2994 cut-off events. For 30403/30407 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18791 event pairs, 483 based on Foata normal form. 4/2959 useless extension candidates. Maximal degree in co-relation 13322. Up to 2552 conditions per place. [2024-05-12 12:47:25,813 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 94 selfloop transitions, 24 changer transitions 0/139 dead transitions. [2024-05-12 12:47:25,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 1312 flow [2024-05-12 12:47:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-05-12 12:47:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793478260869565 [2024-05-12 12:47:25,815 INFO L175 Difference]: Start difference. First operand has 121 places, 118 transitions, 1006 flow. Second operand 4 states and 125 transitions. [2024-05-12 12:47:25,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 1312 flow [2024-05-12 12:47:25,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 139 transitions, 1224 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:25,897 INFO L231 Difference]: Finished difference. Result has 120 places, 121 transitions, 1019 flow [2024-05-12 12:47:25,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1019, PETRI_PLACES=120, PETRI_TRANSITIONS=121} [2024-05-12 12:47:25,898 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-05-12 12:47:25,898 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 121 transitions, 1019 flow [2024-05-12 12:47:25,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:25,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:25,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:47:25,898 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:25,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash -501008610, now seen corresponding path program 3 times [2024-05-12 12:47:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:25,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933237815] [2024-05-12 12:47:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:25,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:26,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:26,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933237815] [2024-05-12 12:47:26,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933237815] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:26,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:26,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:26,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870096683] [2024-05-12 12:47:26,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:26,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:26,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:26,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:26,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 1019 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:26,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:26,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:26,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:26,319 INFO L124 PetriNetUnfolderBase]: 1751/3021 cut-off events. [2024-05-12 12:47:26,319 INFO L125 PetriNetUnfolderBase]: For 29153/29157 co-relation queries the response was YES. [2024-05-12 12:47:26,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13014 conditions, 3021 events. 1751/3021 cut-off events. For 29153/29157 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19080 event pairs, 513 based on Foata normal form. 4/2990 useless extension candidates. Maximal degree in co-relation 12958. Up to 2517 conditions per place. [2024-05-12 12:47:26,340 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 91 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2024-05-12 12:47:26,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 1311 flow [2024-05-12 12:47:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 12:47:26,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-05-12 12:47:26,342 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 1019 flow. Second operand 5 states and 149 transitions. [2024-05-12 12:47:26,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 1311 flow [2024-05-12 12:47:26,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 142 transitions, 1266 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:26,385 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 1046 flow [2024-05-12 12:47:26,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1046, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2024-05-12 12:47:26,385 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-05-12 12:47:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 1046 flow [2024-05-12 12:47:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:26,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:26,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:26,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:47:26,387 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:26,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1579486284, now seen corresponding path program 1 times [2024-05-12 12:47:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:26,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892976673] [2024-05-12 12:47:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892976673] [2024-05-12 12:47:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892976673] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:26,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893810059] [2024-05-12 12:47:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:26,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:26,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:26,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 1046 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:26,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:26,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:26,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:26,842 INFO L124 PetriNetUnfolderBase]: 1744/2941 cut-off events. [2024-05-12 12:47:26,842 INFO L125 PetriNetUnfolderBase]: For 30357/30357 co-relation queries the response was YES. [2024-05-12 12:47:26,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13006 conditions, 2941 events. 1744/2941 cut-off events. For 30357/30357 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18291 event pairs, 406 based on Foata normal form. 2/2904 useless extension candidates. Maximal degree in co-relation 12949. Up to 2571 conditions per place. [2024-05-12 12:47:26,862 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 105 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2024-05-12 12:47:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 136 transitions, 1326 flow [2024-05-12 12:47:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-05-12 12:47:26,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-05-12 12:47:26,864 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 1046 flow. Second operand 4 states and 117 transitions. [2024-05-12 12:47:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 136 transitions, 1326 flow [2024-05-12 12:47:26,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 136 transitions, 1257 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:26,906 INFO L231 Difference]: Finished difference. Result has 123 places, 123 transitions, 1026 flow [2024-05-12 12:47:26,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1026, PETRI_PLACES=123, PETRI_TRANSITIONS=123} [2024-05-12 12:47:26,907 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-05-12 12:47:26,907 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 123 transitions, 1026 flow [2024-05-12 12:47:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:26,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:26,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:26,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:47:26,908 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:26,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1397545337, now seen corresponding path program 1 times [2024-05-12 12:47:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118366275] [2024-05-12 12:47:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:26,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:27,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:27,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118366275] [2024-05-12 12:47:27,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118366275] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:27,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:27,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:27,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203477511] [2024-05-12 12:47:27,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:27,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:27,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:27,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:27,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 123 transitions, 1026 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:27,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:27,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:27,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:27,340 INFO L124 PetriNetUnfolderBase]: 1909/3161 cut-off events. [2024-05-12 12:47:27,341 INFO L125 PetriNetUnfolderBase]: For 31171/31171 co-relation queries the response was YES. [2024-05-12 12:47:27,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13948 conditions, 3161 events. 1909/3161 cut-off events. For 31171/31171 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19548 event pairs, 435 based on Foata normal form. 1/3159 useless extension candidates. Maximal degree in co-relation 13891. Up to 2753 conditions per place. [2024-05-12 12:47:27,360 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 121 selfloop transitions, 32 changer transitions 0/166 dead transitions. [2024-05-12 12:47:27,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 166 transitions, 1636 flow [2024-05-12 12:47:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 12:47:27,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:47:27,362 INFO L175 Difference]: Start difference. First operand has 123 places, 123 transitions, 1026 flow. Second operand 6 states and 174 transitions. [2024-05-12 12:47:27,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 166 transitions, 1636 flow [2024-05-12 12:47:27,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 166 transitions, 1603 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:27,417 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 1224 flow [2024-05-12 12:47:27,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2024-05-12 12:47:27,418 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 78 predicate places. [2024-05-12 12:47:27,418 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 1224 flow [2024-05-12 12:47:27,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:27,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:27,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:27,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:47:27,418 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:27,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1658975511, now seen corresponding path program 2 times [2024-05-12 12:47:27,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:27,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002582785] [2024-05-12 12:47:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:27,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002582785] [2024-05-12 12:47:27,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002582785] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010392457] [2024-05-12 12:47:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:27,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:27,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:27,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 1224 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:27,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:27,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:27,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:27,883 INFO L124 PetriNetUnfolderBase]: 1931/3192 cut-off events. [2024-05-12 12:47:27,883 INFO L125 PetriNetUnfolderBase]: For 34275/34275 co-relation queries the response was YES. [2024-05-12 12:47:27,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14625 conditions, 3192 events. 1931/3192 cut-off events. For 34275/34275 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19645 event pairs, 423 based on Foata normal form. 1/3191 useless extension candidates. Maximal degree in co-relation 14566. Up to 2820 conditions per place. [2024-05-12 12:47:27,905 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 128 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-05-12 12:47:27,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 168 transitions, 1662 flow [2024-05-12 12:47:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 12:47:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-05-12 12:47:27,907 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 1224 flow. Second operand 6 states and 169 transitions. [2024-05-12 12:47:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 168 transitions, 1662 flow [2024-05-12 12:47:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 168 transitions, 1612 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-05-12 12:47:27,959 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1313 flow [2024-05-12 12:47:27,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1313, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-05-12 12:47:27,962 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 84 predicate places. [2024-05-12 12:47:27,962 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1313 flow [2024-05-12 12:47:27,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:27,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:27,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:27,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:47:27,963 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:27,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 835013771, now seen corresponding path program 3 times [2024-05-12 12:47:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:27,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14506784] [2024-05-12 12:47:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:27,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:28,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:28,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14506784] [2024-05-12 12:47:28,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14506784] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:28,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:28,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574029134] [2024-05-12 12:47:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:28,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:28,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:28,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1313 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:28,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:28,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:28,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:28,461 INFO L124 PetriNetUnfolderBase]: 1942/3278 cut-off events. [2024-05-12 12:47:28,461 INFO L125 PetriNetUnfolderBase]: For 37226/37226 co-relation queries the response was YES. [2024-05-12 12:47:28,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14849 conditions, 3278 events. 1942/3278 cut-off events. For 37226/37226 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20628 event pairs, 501 based on Foata normal form. 1/3273 useless extension candidates. Maximal degree in co-relation 14787. Up to 2792 conditions per place. [2024-05-12 12:47:28,482 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 121 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-05-12 12:47:28,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 172 transitions, 1835 flow [2024-05-12 12:47:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 12:47:28,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 12:47:28,484 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1313 flow. Second operand 6 states and 171 transitions. [2024-05-12 12:47:28,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 172 transitions, 1835 flow [2024-05-12 12:47:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 172 transitions, 1766 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:28,532 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1362 flow [2024-05-12 12:47:28,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1362, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2024-05-12 12:47:28,533 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-05-12 12:47:28,533 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1362 flow [2024-05-12 12:47:28,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:28,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:28,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:28,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:47:28,534 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:28,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1419766491, now seen corresponding path program 4 times [2024-05-12 12:47:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:28,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176288939] [2024-05-12 12:47:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:28,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:28,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:28,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176288939] [2024-05-12 12:47:28,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176288939] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:28,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:28,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:28,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189259807] [2024-05-12 12:47:28,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:28,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:28,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:28,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:28,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1362 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:28,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:28,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:28,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:28,999 INFO L124 PetriNetUnfolderBase]: 1953/3301 cut-off events. [2024-05-12 12:47:28,999 INFO L125 PetriNetUnfolderBase]: For 39397/39397 co-relation queries the response was YES. [2024-05-12 12:47:29,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15053 conditions, 3301 events. 1953/3301 cut-off events. For 39397/39397 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20925 event pairs, 501 based on Foata normal form. 1/3296 useless extension candidates. Maximal degree in co-relation 14991. Up to 2804 conditions per place. [2024-05-12 12:47:29,020 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 117 selfloop transitions, 42 changer transitions 0/172 dead transitions. [2024-05-12 12:47:29,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1837 flow [2024-05-12 12:47:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-05-12 12:47:29,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605072463768116 [2024-05-12 12:47:29,022 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1362 flow. Second operand 6 states and 167 transitions. [2024-05-12 12:47:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1837 flow [2024-05-12 12:47:29,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 172 transitions, 1725 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:29,085 INFO L231 Difference]: Finished difference. Result has 138 places, 150 transitions, 1391 flow [2024-05-12 12:47:29,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1391, PETRI_PLACES=138, PETRI_TRANSITIONS=150} [2024-05-12 12:47:29,086 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-05-12 12:47:29,086 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 150 transitions, 1391 flow [2024-05-12 12:47:29,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:29,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:29,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:29,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:47:29,087 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:29,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1813128591, now seen corresponding path program 5 times [2024-05-12 12:47:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:29,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843077661] [2024-05-12 12:47:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:29,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:29,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843077661] [2024-05-12 12:47:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843077661] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:29,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:29,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:29,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082010185] [2024-05-12 12:47:29,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:29,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:29,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:29,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:29,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:29,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 150 transitions, 1391 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:29,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:29,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:29,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:29,637 INFO L124 PetriNetUnfolderBase]: 1950/3226 cut-off events. [2024-05-12 12:47:29,637 INFO L125 PetriNetUnfolderBase]: For 39738/39738 co-relation queries the response was YES. [2024-05-12 12:47:29,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14905 conditions, 3226 events. 1950/3226 cut-off events. For 39738/39738 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20042 event pairs, 423 based on Foata normal form. 1/3227 useless extension candidates. Maximal degree in co-relation 14843. Up to 2765 conditions per place. [2024-05-12 12:47:29,663 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 125 selfloop transitions, 49 changer transitions 0/187 dead transitions. [2024-05-12 12:47:29,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 187 transitions, 1885 flow [2024-05-12 12:47:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:47:29,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 12:47:29,664 INFO L175 Difference]: Start difference. First operand has 138 places, 150 transitions, 1391 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:47:29,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 187 transitions, 1885 flow [2024-05-12 12:47:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 187 transitions, 1803 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:29,737 INFO L231 Difference]: Finished difference. Result has 143 places, 150 transitions, 1433 flow [2024-05-12 12:47:29,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1433, PETRI_PLACES=143, PETRI_TRANSITIONS=150} [2024-05-12 12:47:29,737 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 93 predicate places. [2024-05-12 12:47:29,737 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 150 transitions, 1433 flow [2024-05-12 12:47:29,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:29,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:29,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:47:29,738 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:29,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1712747305, now seen corresponding path program 6 times [2024-05-12 12:47:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:29,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486954388] [2024-05-12 12:47:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:29,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:29,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486954388] [2024-05-12 12:47:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486954388] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:29,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10731162] [2024-05-12 12:47:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:29,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:29,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 1433 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:29,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:29,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:29,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:30,222 INFO L124 PetriNetUnfolderBase]: 1947/3248 cut-off events. [2024-05-12 12:47:30,223 INFO L125 PetriNetUnfolderBase]: For 42971/42971 co-relation queries the response was YES. [2024-05-12 12:47:30,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15038 conditions, 3248 events. 1947/3248 cut-off events. For 42971/42971 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20426 event pairs, 453 based on Foata normal form. 1/3237 useless extension candidates. Maximal degree in co-relation 14975. Up to 2762 conditions per place. [2024-05-12 12:47:30,245 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 111 selfloop transitions, 47 changer transitions 0/171 dead transitions. [2024-05-12 12:47:30,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 171 transitions, 1799 flow [2024-05-12 12:47:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-05-12 12:47:30,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-05-12 12:47:30,247 INFO L175 Difference]: Start difference. First operand has 143 places, 150 transitions, 1433 flow. Second operand 5 states and 148 transitions. [2024-05-12 12:47:30,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 171 transitions, 1799 flow [2024-05-12 12:47:30,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 171 transitions, 1659 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 12:47:30,299 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1397 flow [2024-05-12 12:47:30,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1397, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-05-12 12:47:30,300 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-05-12 12:47:30,300 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1397 flow [2024-05-12 12:47:30,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:30,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:30,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:47:30,301 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:30,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1422614523, now seen corresponding path program 1 times [2024-05-12 12:47:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986027027] [2024-05-12 12:47:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:30,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986027027] [2024-05-12 12:47:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986027027] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:30,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:30,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676421019] [2024-05-12 12:47:30,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:30,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:30,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1397 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:30,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:30,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:30,790 INFO L124 PetriNetUnfolderBase]: 1921/3393 cut-off events. [2024-05-12 12:47:30,790 INFO L125 PetriNetUnfolderBase]: For 47205/47209 co-relation queries the response was YES. [2024-05-12 12:47:30,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15341 conditions, 3393 events. 1921/3393 cut-off events. For 47205/47209 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22460 event pairs, 646 based on Foata normal form. 12/3378 useless extension candidates. Maximal degree in co-relation 15278. Up to 2563 conditions per place. [2024-05-12 12:47:30,812 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 127 selfloop transitions, 24 changer transitions 0/184 dead transitions. [2024-05-12 12:47:30,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 184 transitions, 1877 flow [2024-05-12 12:47:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 12:47:30,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 12:47:30,813 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1397 flow. Second operand 6 states and 176 transitions. [2024-05-12 12:47:30,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 184 transitions, 1877 flow [2024-05-12 12:47:30,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 184 transitions, 1775 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:30,870 INFO L231 Difference]: Finished difference. Result has 142 places, 152 transitions, 1375 flow [2024-05-12 12:47:30,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1375, PETRI_PLACES=142, PETRI_TRANSITIONS=152} [2024-05-12 12:47:30,870 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-05-12 12:47:30,871 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 152 transitions, 1375 flow [2024-05-12 12:47:30,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:30,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:30,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:47:30,871 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:30,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1419757563, now seen corresponding path program 2 times [2024-05-12 12:47:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388736026] [2024-05-12 12:47:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:30,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388736026] [2024-05-12 12:47:31,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388736026] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:31,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:31,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539323466] [2024-05-12 12:47:31,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:31,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:31,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:31,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 152 transitions, 1375 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:31,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:31,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:31,412 INFO L124 PetriNetUnfolderBase]: 1987/3396 cut-off events. [2024-05-12 12:47:31,412 INFO L125 PetriNetUnfolderBase]: For 48404/48406 co-relation queries the response was YES. [2024-05-12 12:47:31,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15736 conditions, 3396 events. 1987/3396 cut-off events. For 48404/48406 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22167 event pairs, 460 based on Foata normal form. 9/3395 useless extension candidates. Maximal degree in co-relation 15673. Up to 2782 conditions per place. [2024-05-12 12:47:31,438 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 123 selfloop transitions, 22 changer transitions 0/178 dead transitions. [2024-05-12 12:47:31,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 178 transitions, 1753 flow [2024-05-12 12:47:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 12:47:31,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-05-12 12:47:31,439 INFO L175 Difference]: Start difference. First operand has 142 places, 152 transitions, 1375 flow. Second operand 6 states and 170 transitions. [2024-05-12 12:47:31,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 178 transitions, 1753 flow [2024-05-12 12:47:31,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 178 transitions, 1724 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:31,513 INFO L231 Difference]: Finished difference. Result has 146 places, 153 transitions, 1412 flow [2024-05-12 12:47:31,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1412, PETRI_PLACES=146, PETRI_TRANSITIONS=153} [2024-05-12 12:47:31,515 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-05-12 12:47:31,515 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 153 transitions, 1412 flow [2024-05-12 12:47:31,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:31,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:47:31,516 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:31,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1712756233, now seen corresponding path program 3 times [2024-05-12 12:47:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836129931] [2024-05-12 12:47:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:31,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836129931] [2024-05-12 12:47:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836129931] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:31,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:31,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27792309] [2024-05-12 12:47:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:31,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:31,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:31,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:31,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 153 transitions, 1412 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:31,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:31,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:32,111 INFO L124 PetriNetUnfolderBase]: 1966/3441 cut-off events. [2024-05-12 12:47:32,111 INFO L125 PetriNetUnfolderBase]: For 46773/46777 co-relation queries the response was YES. [2024-05-12 12:47:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15537 conditions, 3441 events. 1966/3441 cut-off events. For 46773/46777 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22769 event pairs, 634 based on Foata normal form. 14/3425 useless extension candidates. Maximal degree in co-relation 15472. Up to 2722 conditions per place. [2024-05-12 12:47:32,136 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 126 selfloop transitions, 19 changer transitions 0/178 dead transitions. [2024-05-12 12:47:32,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 178 transitions, 1778 flow [2024-05-12 12:47:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-05-12 12:47:32,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:47:32,137 INFO L175 Difference]: Start difference. First operand has 146 places, 153 transitions, 1412 flow. Second operand 5 states and 150 transitions. [2024-05-12 12:47:32,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 178 transitions, 1778 flow [2024-05-12 12:47:32,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 178 transitions, 1732 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:32,205 INFO L231 Difference]: Finished difference. Result has 147 places, 153 transitions, 1413 flow [2024-05-12 12:47:32,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1413, PETRI_PLACES=147, PETRI_TRANSITIONS=153} [2024-05-12 12:47:32,206 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-05-12 12:47:32,206 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 153 transitions, 1413 flow [2024-05-12 12:47:32,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:32,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:32,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:32,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 12:47:32,207 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:32,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -425972881, now seen corresponding path program 1 times [2024-05-12 12:47:32,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109408526] [2024-05-12 12:47:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:32,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:32,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109408526] [2024-05-12 12:47:32,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109408526] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:32,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:32,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:32,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410734092] [2024-05-12 12:47:32,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:32,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:32,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:32,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:32,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 153 transitions, 1413 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:32,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:32,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:32,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:32,775 INFO L124 PetriNetUnfolderBase]: 2154/3549 cut-off events. [2024-05-12 12:47:32,775 INFO L125 PetriNetUnfolderBase]: For 44442/44442 co-relation queries the response was YES. [2024-05-12 12:47:32,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 3549 events. 2154/3549 cut-off events. For 44442/44442 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22379 event pairs, 467 based on Foata normal form. 1/3543 useless extension candidates. Maximal degree in co-relation 16395. Up to 3005 conditions per place. [2024-05-12 12:47:32,805 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 132 selfloop transitions, 55 changer transitions 0/200 dead transitions. [2024-05-12 12:47:32,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 200 transitions, 2125 flow [2024-05-12 12:47:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:47:32,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 12:47:32,806 INFO L175 Difference]: Start difference. First operand has 147 places, 153 transitions, 1413 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:47:32,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 200 transitions, 2125 flow [2024-05-12 12:47:32,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 200 transitions, 2081 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:32,881 INFO L231 Difference]: Finished difference. Result has 151 places, 168 transitions, 1673 flow [2024-05-12 12:47:32,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=151, PETRI_TRANSITIONS=168} [2024-05-12 12:47:32,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 101 predicate places. [2024-05-12 12:47:32,882 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 168 transitions, 1673 flow [2024-05-12 12:47:32,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:32,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:32,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:32,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 12:47:32,882 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:32,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1965280413, now seen corresponding path program 2 times [2024-05-12 12:47:32,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:32,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78022351] [2024-05-12 12:47:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:32,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:33,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:33,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78022351] [2024-05-12 12:47:33,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78022351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:33,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:33,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:33,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59504429] [2024-05-12 12:47:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:33,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:33,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:33,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:33,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 168 transitions, 1673 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:33,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:33,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:33,568 INFO L124 PetriNetUnfolderBase]: 2204/3626 cut-off events. [2024-05-12 12:47:33,568 INFO L125 PetriNetUnfolderBase]: For 49882/49882 co-relation queries the response was YES. [2024-05-12 12:47:33,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17581 conditions, 3626 events. 2204/3626 cut-off events. For 49882/49882 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22900 event pairs, 449 based on Foata normal form. 2/3626 useless extension candidates. Maximal degree in co-relation 17513. Up to 3131 conditions per place. [2024-05-12 12:47:33,596 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 150 selfloop transitions, 54 changer transitions 0/217 dead transitions. [2024-05-12 12:47:33,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 217 transitions, 2413 flow [2024-05-12 12:47:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:47:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:47:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-05-12 12:47:33,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-05-12 12:47:33,598 INFO L175 Difference]: Start difference. First operand has 151 places, 168 transitions, 1673 flow. Second operand 9 states and 244 transitions. [2024-05-12 12:47:33,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 217 transitions, 2413 flow [2024-05-12 12:47:33,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2342 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:33,679 INFO L231 Difference]: Finished difference. Result has 158 places, 180 transitions, 1884 flow [2024-05-12 12:47:33,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1884, PETRI_PLACES=158, PETRI_TRANSITIONS=180} [2024-05-12 12:47:33,680 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 108 predicate places. [2024-05-12 12:47:33,680 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 180 transitions, 1884 flow [2024-05-12 12:47:33,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:33,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:33,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:33,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 12:47:33,680 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:33,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1965073023, now seen corresponding path program 3 times [2024-05-12 12:47:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174468102] [2024-05-12 12:47:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:33,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:33,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174468102] [2024-05-12 12:47:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174468102] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:33,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968903862] [2024-05-12 12:47:33,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:33,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:33,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:33,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:33,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 180 transitions, 1884 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:33,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:33,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:33,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:34,301 INFO L124 PetriNetUnfolderBase]: 2198/3618 cut-off events. [2024-05-12 12:47:34,301 INFO L125 PetriNetUnfolderBase]: For 53172/53172 co-relation queries the response was YES. [2024-05-12 12:47:34,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18117 conditions, 3618 events. 2198/3618 cut-off events. For 53172/53172 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22874 event pairs, 449 based on Foata normal form. 2/3618 useless extension candidates. Maximal degree in co-relation 18047. Up to 3125 conditions per place. [2024-05-12 12:47:34,333 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 145 selfloop transitions, 52 changer transitions 0/210 dead transitions. [2024-05-12 12:47:34,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 210 transitions, 2380 flow [2024-05-12 12:47:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 12:47:34,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 12:47:34,337 INFO L175 Difference]: Start difference. First operand has 158 places, 180 transitions, 1884 flow. Second operand 7 states and 197 transitions. [2024-05-12 12:47:34,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 210 transitions, 2380 flow [2024-05-12 12:47:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 2233 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:34,437 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1851 flow [2024-05-12 12:47:34,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1851, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-05-12 12:47:34,437 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-05-12 12:47:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1851 flow [2024-05-12 12:47:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:34,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:34,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:34,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 12:47:34,438 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:34,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -226405841, now seen corresponding path program 1 times [2024-05-12 12:47:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:34,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893684807] [2024-05-12 12:47:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893684807] [2024-05-12 12:47:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893684807] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:34,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:34,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623770613] [2024-05-12 12:47:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:34,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:34,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1851 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:34,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:34,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:34,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:35,066 INFO L124 PetriNetUnfolderBase]: 2164/3679 cut-off events. [2024-05-12 12:47:35,066 INFO L125 PetriNetUnfolderBase]: For 60465/60469 co-relation queries the response was YES. [2024-05-12 12:47:35,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18131 conditions, 3679 events. 2164/3679 cut-off events. For 60465/60469 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23895 event pairs, 544 based on Foata normal form. 12/3656 useless extension candidates. Maximal degree in co-relation 18059. Up to 2964 conditions per place. [2024-05-12 12:47:35,093 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 143 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-05-12 12:47:35,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2313 flow [2024-05-12 12:47:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 12:47:35,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 12:47:35,094 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1851 flow. Second operand 7 states and 199 transitions. [2024-05-12 12:47:35,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2313 flow [2024-05-12 12:47:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 212 transitions, 2209 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:35,185 INFO L231 Difference]: Finished difference. Result has 161 places, 181 transitions, 1841 flow [2024-05-12 12:47:35,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1841, PETRI_PLACES=161, PETRI_TRANSITIONS=181} [2024-05-12 12:47:35,186 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-05-12 12:47:35,186 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 181 transitions, 1841 flow [2024-05-12 12:47:35,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:35,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:35,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:35,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 12:47:35,187 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:35,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash 651229457, now seen corresponding path program 4 times [2024-05-12 12:47:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:35,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523890470] [2024-05-12 12:47:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523890470] [2024-05-12 12:47:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523890470] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:35,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:35,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:35,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736892024] [2024-05-12 12:47:35,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:35,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:35,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:35,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:35,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 181 transitions, 1841 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:35,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:35,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:35,728 INFO L124 PetriNetUnfolderBase]: 2291/3850 cut-off events. [2024-05-12 12:47:35,729 INFO L125 PetriNetUnfolderBase]: For 59012/59012 co-relation queries the response was YES. [2024-05-12 12:47:35,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19098 conditions, 3850 events. 2291/3850 cut-off events. For 59012/59012 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25079 event pairs, 561 based on Foata normal form. 1/3839 useless extension candidates. Maximal degree in co-relation 19025. Up to 3193 conditions per place. [2024-05-12 12:47:35,757 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 136 selfloop transitions, 65 changer transitions 0/214 dead transitions. [2024-05-12 12:47:35,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 214 transitions, 2503 flow [2024-05-12 12:47:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 12:47:35,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 12:47:35,759 INFO L175 Difference]: Start difference. First operand has 161 places, 181 transitions, 1841 flow. Second operand 7 states and 197 transitions. [2024-05-12 12:47:35,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 214 transitions, 2503 flow [2024-05-12 12:47:35,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 214 transitions, 2429 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:35,891 INFO L231 Difference]: Finished difference. Result has 163 places, 185 transitions, 1957 flow [2024-05-12 12:47:35,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=163, PETRI_TRANSITIONS=185} [2024-05-12 12:47:35,892 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 113 predicate places. [2024-05-12 12:47:35,892 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 185 transitions, 1957 flow [2024-05-12 12:47:35,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:35,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:35,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:35,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 12:47:35,892 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:35,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:35,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1005908207, now seen corresponding path program 5 times [2024-05-12 12:47:35,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:35,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249614413] [2024-05-12 12:47:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:35,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:36,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:36,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249614413] [2024-05-12 12:47:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249614413] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:36,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:36,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480881878] [2024-05-12 12:47:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:36,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:36,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 185 transitions, 1957 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:36,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:36,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:36,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:36,566 INFO L124 PetriNetUnfolderBase]: 2302/3778 cut-off events. [2024-05-12 12:47:36,566 INFO L125 PetriNetUnfolderBase]: For 60170/60170 co-relation queries the response was YES. [2024-05-12 12:47:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19237 conditions, 3778 events. 2302/3778 cut-off events. For 60170/60170 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24057 event pairs, 457 based on Foata normal form. 1/3777 useless extension candidates. Maximal degree in co-relation 19163. Up to 3387 conditions per place. [2024-05-12 12:47:36,604 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 174 selfloop transitions, 25 changer transitions 0/212 dead transitions. [2024-05-12 12:47:36,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 212 transitions, 2454 flow [2024-05-12 12:47:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 12:47:36,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 12:47:36,606 INFO L175 Difference]: Start difference. First operand has 163 places, 185 transitions, 1957 flow. Second operand 7 states and 188 transitions. [2024-05-12 12:47:36,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 212 transitions, 2454 flow [2024-05-12 12:47:36,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 212 transitions, 2323 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:36,789 INFO L231 Difference]: Finished difference. Result has 167 places, 188 transitions, 1933 flow [2024-05-12 12:47:36,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1933, PETRI_PLACES=167, PETRI_TRANSITIONS=188} [2024-05-12 12:47:36,790 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2024-05-12 12:47:36,790 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 188 transitions, 1933 flow [2024-05-12 12:47:36,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:36,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:36,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:36,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 12:47:36,791 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:36,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash -149081857, now seen corresponding path program 6 times [2024-05-12 12:47:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:36,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206375724] [2024-05-12 12:47:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:36,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:36,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:36,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206375724] [2024-05-12 12:47:36,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206375724] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:36,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:36,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047401966] [2024-05-12 12:47:36,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:36,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:36,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:36,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 188 transitions, 1933 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:36,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:36,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:36,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:37,460 INFO L124 PetriNetUnfolderBase]: 2313/3888 cut-off events. [2024-05-12 12:47:37,461 INFO L125 PetriNetUnfolderBase]: For 63649/63649 co-relation queries the response was YES. [2024-05-12 12:47:37,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19264 conditions, 3888 events. 2313/3888 cut-off events. For 63649/63649 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25308 event pairs, 559 based on Foata normal form. 1/3876 useless extension candidates. Maximal degree in co-relation 19188. Up to 3217 conditions per place. [2024-05-12 12:47:37,495 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 133 selfloop transitions, 70 changer transitions 0/216 dead transitions. [2024-05-12 12:47:37,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 216 transitions, 2515 flow [2024-05-12 12:47:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 12:47:37,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 12:47:37,498 INFO L175 Difference]: Start difference. First operand has 167 places, 188 transitions, 1933 flow. Second operand 7 states and 194 transitions. [2024-05-12 12:47:37,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 216 transitions, 2515 flow [2024-05-12 12:47:37,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 216 transitions, 2397 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 12:47:37,626 INFO L231 Difference]: Finished difference. Result has 167 places, 191 transitions, 2007 flow [2024-05-12 12:47:37,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2007, PETRI_PLACES=167, PETRI_TRANSITIONS=191} [2024-05-12 12:47:37,627 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 117 predicate places. [2024-05-12 12:47:37,627 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 191 transitions, 2007 flow [2024-05-12 12:47:37,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:37,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:37,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:37,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 12:47:37,627 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:37,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1748611883, now seen corresponding path program 7 times [2024-05-12 12:47:37,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:37,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185940319] [2024-05-12 12:47:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:37,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:37,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185940319] [2024-05-12 12:47:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185940319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:37,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959476409] [2024-05-12 12:47:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:37,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:37,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:37,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 191 transitions, 2007 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:37,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:37,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:37,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:38,289 INFO L124 PetriNetUnfolderBase]: 2338/3847 cut-off events. [2024-05-12 12:47:38,289 INFO L125 PetriNetUnfolderBase]: For 66024/66024 co-relation queries the response was YES. [2024-05-12 12:47:38,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19694 conditions, 3847 events. 2338/3847 cut-off events. For 66024/66024 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24642 event pairs, 463 based on Foata normal form. 1/3846 useless extension candidates. Maximal degree in co-relation 19618. Up to 3369 conditions per place. [2024-05-12 12:47:38,318 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 174 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-05-12 12:47:38,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 230 transitions, 2714 flow [2024-05-12 12:47:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 12:47:38,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 12:47:38,323 INFO L175 Difference]: Start difference. First operand has 167 places, 191 transitions, 2007 flow. Second operand 6 states and 180 transitions. [2024-05-12 12:47:38,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 230 transitions, 2714 flow [2024-05-12 12:47:38,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2578 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:38,465 INFO L231 Difference]: Finished difference. Result has 170 places, 199 transitions, 2134 flow [2024-05-12 12:47:38,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2134, PETRI_PLACES=170, PETRI_TRANSITIONS=199} [2024-05-12 12:47:38,473 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2024-05-12 12:47:38,473 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 199 transitions, 2134 flow [2024-05-12 12:47:38,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:38,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:38,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:38,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 12:47:38,474 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:38,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1755278123, now seen corresponding path program 8 times [2024-05-12 12:47:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:38,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793197502] [2024-05-12 12:47:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:38,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:38,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793197502] [2024-05-12 12:47:38,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793197502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:38,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:38,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:38,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540778786] [2024-05-12 12:47:38,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:38,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:38,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:38,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:38,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 199 transitions, 2134 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:38,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:38,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:38,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:39,175 INFO L124 PetriNetUnfolderBase]: 2335/3897 cut-off events. [2024-05-12 12:47:39,182 INFO L125 PetriNetUnfolderBase]: For 68529/68529 co-relation queries the response was YES. [2024-05-12 12:47:39,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19765 conditions, 3897 events. 2335/3897 cut-off events. For 68529/68529 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25245 event pairs, 517 based on Foata normal form. 1/3894 useless extension candidates. Maximal degree in co-relation 19687. Up to 3366 conditions per place. [2024-05-12 12:47:39,234 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 179 selfloop transitions, 43 changer transitions 0/235 dead transitions. [2024-05-12 12:47:39,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 2664 flow [2024-05-12 12:47:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 12:47:39,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-05-12 12:47:39,236 INFO L175 Difference]: Start difference. First operand has 170 places, 199 transitions, 2134 flow. Second operand 7 states and 206 transitions. [2024-05-12 12:47:39,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 2664 flow [2024-05-12 12:47:39,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 235 transitions, 2572 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:39,438 INFO L231 Difference]: Finished difference. Result has 174 places, 199 transitions, 2142 flow [2024-05-12 12:47:39,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2142, PETRI_PLACES=174, PETRI_TRANSITIONS=199} [2024-05-12 12:47:39,438 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2024-05-12 12:47:39,439 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 199 transitions, 2142 flow [2024-05-12 12:47:39,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:39,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:39,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:39,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 12:47:39,439 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:39,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1348907183, now seen corresponding path program 9 times [2024-05-12 12:47:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:39,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556463820] [2024-05-12 12:47:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:39,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556463820] [2024-05-12 12:47:39,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556463820] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:39,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:39,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921950049] [2024-05-12 12:47:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:39,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:39,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 199 transitions, 2142 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:39,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:39,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:39,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:40,137 INFO L124 PetriNetUnfolderBase]: 2371/3914 cut-off events. [2024-05-12 12:47:40,138 INFO L125 PetriNetUnfolderBase]: For 73326/73326 co-relation queries the response was YES. [2024-05-12 12:47:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20184 conditions, 3914 events. 2371/3914 cut-off events. For 73326/73326 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25142 event pairs, 481 based on Foata normal form. 2/3910 useless extension candidates. Maximal degree in co-relation 20105. Up to 3224 conditions per place. [2024-05-12 12:47:40,172 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 140 selfloop transitions, 96 changer transitions 0/249 dead transitions. [2024-05-12 12:47:40,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 249 transitions, 3003 flow [2024-05-12 12:47:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:47:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:47:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-05-12 12:47:40,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-05-12 12:47:40,175 INFO L175 Difference]: Start difference. First operand has 174 places, 199 transitions, 2142 flow. Second operand 8 states and 234 transitions. [2024-05-12 12:47:40,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 249 transitions, 3003 flow [2024-05-12 12:47:40,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 249 transitions, 2903 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:40,344 INFO L231 Difference]: Finished difference. Result has 176 places, 208 transitions, 2395 flow [2024-05-12 12:47:40,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2395, PETRI_PLACES=176, PETRI_TRANSITIONS=208} [2024-05-12 12:47:40,344 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 126 predicate places. [2024-05-12 12:47:40,344 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 208 transitions, 2395 flow [2024-05-12 12:47:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:40,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:40,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:40,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 12:47:40,345 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:40,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1349114573, now seen corresponding path program 10 times [2024-05-12 12:47:40,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:40,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120115323] [2024-05-12 12:47:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:40,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:40,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120115323] [2024-05-12 12:47:40,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120115323] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:40,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:40,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222011465] [2024-05-12 12:47:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:40,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:40,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:40,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:40,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 208 transitions, 2395 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:40,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:40,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:40,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:41,032 INFO L124 PetriNetUnfolderBase]: 2379/3919 cut-off events. [2024-05-12 12:47:41,033 INFO L125 PetriNetUnfolderBase]: For 75471/75471 co-relation queries the response was YES. [2024-05-12 12:47:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20904 conditions, 3919 events. 2379/3919 cut-off events. For 75471/75471 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25102 event pairs, 463 based on Foata normal form. 2/3919 useless extension candidates. Maximal degree in co-relation 20825. Up to 3233 conditions per place. [2024-05-12 12:47:41,071 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 135 selfloop transitions, 104 changer transitions 0/252 dead transitions. [2024-05-12 12:47:41,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 3175 flow [2024-05-12 12:47:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:47:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:47:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-05-12 12:47:41,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6135265700483091 [2024-05-12 12:47:41,073 INFO L175 Difference]: Start difference. First operand has 176 places, 208 transitions, 2395 flow. Second operand 9 states and 254 transitions. [2024-05-12 12:47:41,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 3175 flow [2024-05-12 12:47:41,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 252 transitions, 2956 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:41,186 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 2454 flow [2024-05-12 12:47:41,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2454, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-05-12 12:47:41,187 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-05-12 12:47:41,187 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 2454 flow [2024-05-12 12:47:41,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:41,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:41,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 12:47:41,187 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:41,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1555560623, now seen corresponding path program 11 times [2024-05-12 12:47:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:41,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790755502] [2024-05-12 12:47:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790755502] [2024-05-12 12:47:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790755502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:41,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:41,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233272540] [2024-05-12 12:47:41,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:41,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:41,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 2454 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:41,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:41,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:41,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:41,912 INFO L124 PetriNetUnfolderBase]: 2376/3925 cut-off events. [2024-05-12 12:47:41,912 INFO L125 PetriNetUnfolderBase]: For 71362/71362 co-relation queries the response was YES. [2024-05-12 12:47:41,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3925 events. 2376/3925 cut-off events. For 71362/71362 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25407 event pairs, 511 based on Foata normal form. 1/3916 useless extension candidates. Maximal degree in co-relation 20544. Up to 3230 conditions per place. [2024-05-12 12:47:41,943 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 130 selfloop transitions, 93 changer transitions 0/236 dead transitions. [2024-05-12 12:47:41,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 3038 flow [2024-05-12 12:47:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:47:41,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:47:41,945 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 2454 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:47:41,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 3038 flow [2024-05-12 12:47:42,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 236 transitions, 2830 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:42,103 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 2440 flow [2024-05-12 12:47:42,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2440, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-05-12 12:47:42,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-05-12 12:47:42,104 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 2440 flow [2024-05-12 12:47:42,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:42,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:42,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 12:47:42,105 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash -421262505, now seen corresponding path program 2 times [2024-05-12 12:47:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837184749] [2024-05-12 12:47:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:42,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837184749] [2024-05-12 12:47:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837184749] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:42,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:42,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031915699] [2024-05-12 12:47:42,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:42,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:42,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:42,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:42,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:42,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:42,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 2440 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:42,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:42,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:42,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:42,742 INFO L124 PetriNetUnfolderBase]: 2319/3871 cut-off events. [2024-05-12 12:47:42,742 INFO L125 PetriNetUnfolderBase]: For 77759/77759 co-relation queries the response was YES. [2024-05-12 12:47:42,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20320 conditions, 3871 events. 2319/3871 cut-off events. For 77759/77759 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25199 event pairs, 342 based on Foata normal form. 9/3841 useless extension candidates. Maximal degree in co-relation 20240. Up to 3112 conditions per place. [2024-05-12 12:47:42,772 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 168 selfloop transitions, 31 changer transitions 0/240 dead transitions. [2024-05-12 12:47:42,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 240 transitions, 2938 flow [2024-05-12 12:47:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-05-12 12:47:42,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6782608695652174 [2024-05-12 12:47:42,773 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 2440 flow. Second operand 5 states and 156 transitions. [2024-05-12 12:47:42,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 240 transitions, 2938 flow [2024-05-12 12:47:42,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 240 transitions, 2722 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:42,894 INFO L231 Difference]: Finished difference. Result has 178 places, 212 transitions, 2315 flow [2024-05-12 12:47:42,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2315, PETRI_PLACES=178, PETRI_TRANSITIONS=212} [2024-05-12 12:47:42,895 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 128 predicate places. [2024-05-12 12:47:42,895 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 212 transitions, 2315 flow [2024-05-12 12:47:42,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:42,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:42,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:42,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 12:47:42,896 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:42,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -420844935, now seen corresponding path program 3 times [2024-05-12 12:47:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:42,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875814289] [2024-05-12 12:47:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:42,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:43,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875814289] [2024-05-12 12:47:43,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875814289] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:43,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:43,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:43,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443201956] [2024-05-12 12:47:43,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:43,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:43,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:43,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:43,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:43,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:43,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 212 transitions, 2315 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:43,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:43,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:43,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:43,567 INFO L124 PetriNetUnfolderBase]: 2372/4144 cut-off events. [2024-05-12 12:47:43,567 INFO L125 PetriNetUnfolderBase]: For 80430/80430 co-relation queries the response was YES. [2024-05-12 12:47:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20846 conditions, 4144 events. 2372/4144 cut-off events. For 80430/80430 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28124 event pairs, 675 based on Foata normal form. 8/4076 useless extension candidates. Maximal degree in co-relation 20765. Up to 3139 conditions per place. [2024-05-12 12:47:43,599 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 172 selfloop transitions, 34 changer transitions 0/247 dead transitions. [2024-05-12 12:47:43,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 247 transitions, 2851 flow [2024-05-12 12:47:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 12:47:43,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-05-12 12:47:43,600 INFO L175 Difference]: Start difference. First operand has 178 places, 212 transitions, 2315 flow. Second operand 6 states and 182 transitions. [2024-05-12 12:47:43,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 247 transitions, 2851 flow [2024-05-12 12:47:43,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 247 transitions, 2796 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:43,778 INFO L231 Difference]: Finished difference. Result has 181 places, 213 transitions, 2350 flow [2024-05-12 12:47:43,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2350, PETRI_PLACES=181, PETRI_TRANSITIONS=213} [2024-05-12 12:47:43,779 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 12:47:43,779 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 213 transitions, 2350 flow [2024-05-12 12:47:43,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:43,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:43,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 12:47:43,780 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:43,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash -432880995, now seen corresponding path program 4 times [2024-05-12 12:47:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117042145] [2024-05-12 12:47:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:43,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:43,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117042145] [2024-05-12 12:47:43,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117042145] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:43,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:43,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:43,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522579193] [2024-05-12 12:47:43,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:43,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:43,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 12:47:43,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 213 transitions, 2350 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:43,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:43,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 12:47:43,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:44,376 INFO L124 PetriNetUnfolderBase]: 2415/4065 cut-off events. [2024-05-12 12:47:44,377 INFO L125 PetriNetUnfolderBase]: For 82407/82411 co-relation queries the response was YES. [2024-05-12 12:47:44,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21004 conditions, 4065 events. 2415/4065 cut-off events. For 82407/82411 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26896 event pairs, 614 based on Foata normal form. 12/4028 useless extension candidates. Maximal degree in co-relation 20922. Up to 3211 conditions per place. [2024-05-12 12:47:44,410 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 163 selfloop transitions, 38 changer transitions 0/242 dead transitions. [2024-05-12 12:47:44,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 242 transitions, 2854 flow [2024-05-12 12:47:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:47:44,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 12:47:44,412 INFO L175 Difference]: Start difference. First operand has 181 places, 213 transitions, 2350 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:47:44,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 242 transitions, 2854 flow [2024-05-12 12:47:44,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 242 transitions, 2778 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:44,581 INFO L231 Difference]: Finished difference. Result has 183 places, 214 transitions, 2380 flow [2024-05-12 12:47:44,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2380, PETRI_PLACES=183, PETRI_TRANSITIONS=214} [2024-05-12 12:47:44,581 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2024-05-12 12:47:44,581 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 214 transitions, 2380 flow [2024-05-12 12:47:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:44,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:44,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:44,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 12:47:44,582 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:44,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1762911563, now seen corresponding path program 1 times [2024-05-12 12:47:44,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:44,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645531327] [2024-05-12 12:47:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645531327] [2024-05-12 12:47:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645531327] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:44,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:44,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351026290] [2024-05-12 12:47:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:44,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:44,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:44,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 214 transitions, 2380 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:44,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:44,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:44,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:45,296 INFO L124 PetriNetUnfolderBase]: 2545/4255 cut-off events. [2024-05-12 12:47:45,297 INFO L125 PetriNetUnfolderBase]: For 76321/76321 co-relation queries the response was YES. [2024-05-12 12:47:45,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21594 conditions, 4255 events. 2545/4255 cut-off events. For 76321/76321 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28135 event pairs, 466 based on Foata normal form. 6/4257 useless extension candidates. Maximal degree in co-relation 21511. Up to 3576 conditions per place. [2024-05-12 12:47:45,333 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 211 selfloop transitions, 22 changer transitions 0/246 dead transitions. [2024-05-12 12:47:45,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 246 transitions, 2968 flow [2024-05-12 12:47:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 12:47:45,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 12:47:45,335 INFO L175 Difference]: Start difference. First operand has 183 places, 214 transitions, 2380 flow. Second operand 6 states and 174 transitions. [2024-05-12 12:47:45,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 246 transitions, 2968 flow [2024-05-12 12:47:45,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 246 transitions, 2888 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:45,529 INFO L231 Difference]: Finished difference. Result has 185 places, 214 transitions, 2348 flow [2024-05-12 12:47:45,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2348, PETRI_PLACES=185, PETRI_TRANSITIONS=214} [2024-05-12 12:47:45,529 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 135 predicate places. [2024-05-12 12:47:45,529 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 214 transitions, 2348 flow [2024-05-12 12:47:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:45,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:45,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 12:47:45,530 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:45,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1082055386, now seen corresponding path program 1 times [2024-05-12 12:47:45,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948341660] [2024-05-12 12:47:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:45,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948341660] [2024-05-12 12:47:45,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948341660] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:45,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046472877] [2024-05-12 12:47:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:45,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:47:45,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:47:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:47:45,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-05-12 12:47:45,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 214 transitions, 2348 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:45,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:45,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-05-12 12:47:45,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:45,993 INFO L124 PetriNetUnfolderBase]: 1758/3890 cut-off events. [2024-05-12 12:47:45,993 INFO L125 PetriNetUnfolderBase]: For 37607/37786 co-relation queries the response was YES. [2024-05-12 12:47:46,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14837 conditions, 3890 events. 1758/3890 cut-off events. For 37607/37786 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 32156 event pairs, 258 based on Foata normal form. 195/3827 useless extension candidates. Maximal degree in co-relation 14753. Up to 1513 conditions per place. [2024-05-12 12:47:46,023 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 80 changer transitions 0/231 dead transitions. [2024-05-12 12:47:46,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 231 transitions, 2682 flow [2024-05-12 12:47:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-05-12 12:47:46,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-05-12 12:47:46,025 INFO L175 Difference]: Start difference. First operand has 185 places, 214 transitions, 2348 flow. Second operand 4 states and 135 transitions. [2024-05-12 12:47:46,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 231 transitions, 2682 flow [2024-05-12 12:47:46,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 231 transitions, 2618 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:46,119 INFO L231 Difference]: Finished difference. Result has 185 places, 218 transitions, 2658 flow [2024-05-12 12:47:46,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2658, PETRI_PLACES=185, PETRI_TRANSITIONS=218} [2024-05-12 12:47:46,119 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 135 predicate places. [2024-05-12 12:47:46,120 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 218 transitions, 2658 flow [2024-05-12 12:47:46,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:46,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:46,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:46,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 12:47:46,120 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:46,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash 993284454, now seen corresponding path program 1 times [2024-05-12 12:47:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:46,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901514576] [2024-05-12 12:47:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:46,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901514576] [2024-05-12 12:47:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901514576] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651076606] [2024-05-12 12:47:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:46,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:46,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 218 transitions, 2658 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:46,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:46,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:46,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:46,886 INFO L124 PetriNetUnfolderBase]: 2572/4405 cut-off events. [2024-05-12 12:47:46,886 INFO L125 PetriNetUnfolderBase]: For 76571/76595 co-relation queries the response was YES. [2024-05-12 12:47:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22922 conditions, 4405 events. 2572/4405 cut-off events. For 76571/76595 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29641 event pairs, 904 based on Foata normal form. 1/4224 useless extension candidates. Maximal degree in co-relation 22837. Up to 3873 conditions per place. [2024-05-12 12:47:46,915 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 199 selfloop transitions, 34 changer transitions 0/247 dead transitions. [2024-05-12 12:47:46,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 247 transitions, 3238 flow [2024-05-12 12:47:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 12:47:46,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 12:47:46,916 INFO L175 Difference]: Start difference. First operand has 185 places, 218 transitions, 2658 flow. Second operand 7 states and 190 transitions. [2024-05-12 12:47:46,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 247 transitions, 3238 flow [2024-05-12 12:47:47,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 247 transitions, 3228 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:47,082 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 2776 flow [2024-05-12 12:47:47,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2776, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-05-12 12:47:47,083 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2024-05-12 12:47:47,083 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 2776 flow [2024-05-12 12:47:47,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:47,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:47,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 12:47:47,084 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:47,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 497257912, now seen corresponding path program 2 times [2024-05-12 12:47:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:47,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471581753] [2024-05-12 12:47:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:47,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:47,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:47,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471581753] [2024-05-12 12:47:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471581753] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:47,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451628490] [2024-05-12 12:47:47,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:47,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:47,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:47,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 2776 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:47,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:47,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:47,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:47,718 INFO L124 PetriNetUnfolderBase]: 2589/4430 cut-off events. [2024-05-12 12:47:47,718 INFO L125 PetriNetUnfolderBase]: For 75646/75678 co-relation queries the response was YES. [2024-05-12 12:47:47,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22847 conditions, 4430 events. 2589/4430 cut-off events. For 75646/75678 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29807 event pairs, 910 based on Foata normal form. 9/4257 useless extension candidates. Maximal degree in co-relation 22760. Up to 3805 conditions per place. [2024-05-12 12:47:47,752 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 173 selfloop transitions, 68 changer transitions 0/255 dead transitions. [2024-05-12 12:47:47,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 3654 flow [2024-05-12 12:47:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 12:47:47,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 12:47:47,754 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 2776 flow. Second operand 7 states and 193 transitions. [2024-05-12 12:47:47,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 3654 flow [2024-05-12 12:47:47,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 255 transitions, 3567 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:47,967 INFO L231 Difference]: Finished difference. Result has 194 places, 230 transitions, 2999 flow [2024-05-12 12:47:47,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2999, PETRI_PLACES=194, PETRI_TRANSITIONS=230} [2024-05-12 12:47:47,968 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-05-12 12:47:47,968 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 230 transitions, 2999 flow [2024-05-12 12:47:47,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:47,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:47,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 12:47:47,968 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:47,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1393965832, now seen corresponding path program 3 times [2024-05-12 12:47:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796081272] [2024-05-12 12:47:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:48,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796081272] [2024-05-12 12:47:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796081272] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:48,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:48,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:48,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948365211] [2024-05-12 12:47:48,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:48,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:48,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 230 transitions, 2999 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:48,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:48,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:48,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:48,631 INFO L124 PetriNetUnfolderBase]: 2596/4446 cut-off events. [2024-05-12 12:47:48,631 INFO L125 PetriNetUnfolderBase]: For 79416/79445 co-relation queries the response was YES. [2024-05-12 12:47:48,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23187 conditions, 4446 events. 2596/4446 cut-off events. For 79416/79445 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29961 event pairs, 917 based on Foata normal form. 9/4271 useless extension candidates. Maximal degree in co-relation 23099. Up to 3813 conditions per place. [2024-05-12 12:47:48,738 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 171 selfloop transitions, 70 changer transitions 0/255 dead transitions. [2024-05-12 12:47:48,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3771 flow [2024-05-12 12:47:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 12:47:48,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 12:47:48,740 INFO L175 Difference]: Start difference. First operand has 194 places, 230 transitions, 2999 flow. Second operand 7 states and 190 transitions. [2024-05-12 12:47:48,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3771 flow [2024-05-12 12:47:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 255 transitions, 3653 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:48,915 INFO L231 Difference]: Finished difference. Result has 199 places, 233 transitions, 3087 flow [2024-05-12 12:47:48,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3087, PETRI_PLACES=199, PETRI_TRANSITIONS=233} [2024-05-12 12:47:48,916 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 149 predicate places. [2024-05-12 12:47:48,916 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 233 transitions, 3087 flow [2024-05-12 12:47:48,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:48,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:48,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:48,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 12:47:48,917 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:48,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -204976406, now seen corresponding path program 4 times [2024-05-12 12:47:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:48,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544162024] [2024-05-12 12:47:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:48,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:49,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:49,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544162024] [2024-05-12 12:47:49,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544162024] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:49,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:49,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:49,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755440226] [2024-05-12 12:47:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:49,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:49,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:49,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 233 transitions, 3087 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:49,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:49,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:49,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:49,598 INFO L124 PetriNetUnfolderBase]: 2603/4456 cut-off events. [2024-05-12 12:47:49,599 INFO L125 PetriNetUnfolderBase]: For 81686/81707 co-relation queries the response was YES. [2024-05-12 12:47:49,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23416 conditions, 4456 events. 2603/4456 cut-off events. For 81686/81707 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30065 event pairs, 911 based on Foata normal form. 1/4267 useless extension candidates. Maximal degree in co-relation 23326. Up to 3922 conditions per place. [2024-05-12 12:47:49,635 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 209 selfloop transitions, 30 changer transitions 0/253 dead transitions. [2024-05-12 12:47:49,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 253 transitions, 3655 flow [2024-05-12 12:47:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 12:47:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 12:47:49,636 INFO L175 Difference]: Start difference. First operand has 199 places, 233 transitions, 3087 flow. Second operand 7 states and 182 transitions. [2024-05-12 12:47:49,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 253 transitions, 3655 flow [2024-05-12 12:47:49,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 253 transitions, 3521 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:49,870 INFO L231 Difference]: Finished difference. Result has 202 places, 236 transitions, 3073 flow [2024-05-12 12:47:49,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3073, PETRI_PLACES=202, PETRI_TRANSITIONS=236} [2024-05-12 12:47:49,870 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 152 predicate places. [2024-05-12 12:47:49,871 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 236 transitions, 3073 flow [2024-05-12 12:47:49,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:49,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:49,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:49,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 12:47:49,871 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:49,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1280887942, now seen corresponding path program 1 times [2024-05-12 12:47:49,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:49,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047557801] [2024-05-12 12:47:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:49,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:49,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047557801] [2024-05-12 12:47:49,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047557801] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:49,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:49,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:49,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903323812] [2024-05-12 12:47:49,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:49,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:49,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:50,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:50,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 236 transitions, 3073 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:50,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:50,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:50,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:50,615 INFO L124 PetriNetUnfolderBase]: 2650/4557 cut-off events. [2024-05-12 12:47:50,615 INFO L125 PetriNetUnfolderBase]: For 88259/88291 co-relation queries the response was YES. [2024-05-12 12:47:50,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23871 conditions, 4557 events. 2650/4557 cut-off events. For 88259/88291 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30903 event pairs, 894 based on Foata normal form. 10/4378 useless extension candidates. Maximal degree in co-relation 23780. Up to 3902 conditions per place. [2024-05-12 12:47:50,646 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 208 selfloop transitions, 48 changer transitions 0/270 dead transitions. [2024-05-12 12:47:50,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 270 transitions, 3813 flow [2024-05-12 12:47:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 12:47:50,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 12:47:50,659 INFO L175 Difference]: Start difference. First operand has 202 places, 236 transitions, 3073 flow. Second operand 7 states and 194 transitions. [2024-05-12 12:47:50,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 270 transitions, 3813 flow [2024-05-12 12:47:50,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 270 transitions, 3735 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:50,913 INFO L231 Difference]: Finished difference. Result has 204 places, 240 transitions, 3156 flow [2024-05-12 12:47:50,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3156, PETRI_PLACES=204, PETRI_TRANSITIONS=240} [2024-05-12 12:47:50,914 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2024-05-12 12:47:50,914 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 240 transitions, 3156 flow [2024-05-12 12:47:50,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:50,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:50,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:50,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 12:47:50,915 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:50,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1283744902, now seen corresponding path program 2 times [2024-05-12 12:47:50,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:50,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639883292] [2024-05-12 12:47:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:50,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:51,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:51,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639883292] [2024-05-12 12:47:51,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639883292] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:51,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:51,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:51,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429640273] [2024-05-12 12:47:51,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:51,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:51,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:51,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:51,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:51,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:51,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 240 transitions, 3156 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:51,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:51,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:51,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:51,626 INFO L124 PetriNetUnfolderBase]: 2671/4567 cut-off events. [2024-05-12 12:47:51,626 INFO L125 PetriNetUnfolderBase]: For 92250/92279 co-relation queries the response was YES. [2024-05-12 12:47:51,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24404 conditions, 4567 events. 2671/4567 cut-off events. For 92250/92279 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30907 event pairs, 929 based on Foata normal form. 10/4385 useless extension candidates. Maximal degree in co-relation 24312. Up to 3989 conditions per place. [2024-05-12 12:47:51,664 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 206 selfloop transitions, 45 changer transitions 0/265 dead transitions. [2024-05-12 12:47:51,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 265 transitions, 3750 flow [2024-05-12 12:47:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 12:47:51,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 12:47:51,665 INFO L175 Difference]: Start difference. First operand has 204 places, 240 transitions, 3156 flow. Second operand 7 states and 187 transitions. [2024-05-12 12:47:51,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 265 transitions, 3750 flow [2024-05-12 12:47:51,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 3652 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:51,916 INFO L231 Difference]: Finished difference. Result has 208 places, 242 transitions, 3189 flow [2024-05-12 12:47:51,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3189, PETRI_PLACES=208, PETRI_TRANSITIONS=242} [2024-05-12 12:47:51,916 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 158 predicate places. [2024-05-12 12:47:51,917 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 242 transitions, 3189 flow [2024-05-12 12:47:51,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:51,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:51,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 12:47:51,917 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:51,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash 622079226, now seen corresponding path program 3 times [2024-05-12 12:47:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:51,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584173214] [2024-05-12 12:47:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:51,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584173214] [2024-05-12 12:47:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584173214] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:52,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:52,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:52,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332731256] [2024-05-12 12:47:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:52,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:52,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 242 transitions, 3189 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:52,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:52,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:52,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:52,770 INFO L124 PetriNetUnfolderBase]: 2766/4726 cut-off events. [2024-05-12 12:47:52,770 INFO L125 PetriNetUnfolderBase]: For 95105/95129 co-relation queries the response was YES. [2024-05-12 12:47:52,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25089 conditions, 4726 events. 2766/4726 cut-off events. For 95105/95129 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32197 event pairs, 947 based on Foata normal form. 2/4524 useless extension candidates. Maximal degree in co-relation 24995. Up to 4076 conditions per place. [2024-05-12 12:47:52,808 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 224 selfloop transitions, 30 changer transitions 0/268 dead transitions. [2024-05-12 12:47:52,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 268 transitions, 3814 flow [2024-05-12 12:47:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 12:47:52,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 12:47:52,809 INFO L175 Difference]: Start difference. First operand has 208 places, 242 transitions, 3189 flow. Second operand 7 states and 187 transitions. [2024-05-12 12:47:52,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 268 transitions, 3814 flow [2024-05-12 12:47:53,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 268 transitions, 3715 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:53,088 INFO L231 Difference]: Finished difference. Result has 210 places, 245 transitions, 3197 flow [2024-05-12 12:47:53,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3197, PETRI_PLACES=210, PETRI_TRANSITIONS=245} [2024-05-12 12:47:53,088 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-05-12 12:47:53,089 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 245 transitions, 3197 flow [2024-05-12 12:47:53,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:53,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:53,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 12:47:53,089 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:53,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1296256666, now seen corresponding path program 5 times [2024-05-12 12:47:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:53,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216515478] [2024-05-12 12:47:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:53,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:53,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216515478] [2024-05-12 12:47:53,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216515478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:53,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:53,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:53,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696606189] [2024-05-12 12:47:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:53,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:53,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:53,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:53,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 245 transitions, 3197 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:53,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:53,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:53,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:53,838 INFO L124 PetriNetUnfolderBase]: 2773/4730 cut-off events. [2024-05-12 12:47:53,838 INFO L125 PetriNetUnfolderBase]: For 98242/98284 co-relation queries the response was YES. [2024-05-12 12:47:53,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25294 conditions, 4730 events. 2773/4730 cut-off events. For 98242/98284 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32212 event pairs, 958 based on Foata normal form. 16/4543 useless extension candidates. Maximal degree in co-relation 25199. Up to 4074 conditions per place. [2024-05-12 12:47:53,878 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 179 selfloop transitions, 77 changer transitions 0/270 dead transitions. [2024-05-12 12:47:53,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 270 transitions, 4017 flow [2024-05-12 12:47:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 12:47:53,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 12:47:53,879 INFO L175 Difference]: Start difference. First operand has 210 places, 245 transitions, 3197 flow. Second operand 7 states and 190 transitions. [2024-05-12 12:47:53,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 270 transitions, 4017 flow [2024-05-12 12:47:54,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 270 transitions, 3949 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:54,135 INFO L231 Difference]: Finished difference. Result has 212 places, 248 transitions, 3347 flow [2024-05-12 12:47:54,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3347, PETRI_PLACES=212, PETRI_TRANSITIONS=248} [2024-05-12 12:47:54,135 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 162 predicate places. [2024-05-12 12:47:54,135 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 248 transitions, 3347 flow [2024-05-12 12:47:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:54,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:54,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:54,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 12:47:54,136 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:54,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1286733466, now seen corresponding path program 6 times [2024-05-12 12:47:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315586653] [2024-05-12 12:47:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315586653] [2024-05-12 12:47:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315586653] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:54,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:54,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316841487] [2024-05-12 12:47:54,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:54,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:54,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:54,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 248 transitions, 3347 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:54,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:54,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:54,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:54,826 INFO L124 PetriNetUnfolderBase]: 2780/4741 cut-off events. [2024-05-12 12:47:54,826 INFO L125 PetriNetUnfolderBase]: For 101570/101612 co-relation queries the response was YES. [2024-05-12 12:47:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25503 conditions, 4741 events. 2780/4741 cut-off events. For 101570/101612 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32262 event pairs, 958 based on Foata normal form. 16/4552 useless extension candidates. Maximal degree in co-relation 25407. Up to 4082 conditions per place. [2024-05-12 12:47:54,866 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 178 selfloop transitions, 78 changer transitions 0/270 dead transitions. [2024-05-12 12:47:54,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 270 transitions, 4169 flow [2024-05-12 12:47:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 12:47:54,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 12:47:54,868 INFO L175 Difference]: Start difference. First operand has 212 places, 248 transitions, 3347 flow. Second operand 7 states and 188 transitions. [2024-05-12 12:47:54,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 270 transitions, 4169 flow [2024-05-12 12:47:55,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 270 transitions, 3920 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:55,175 INFO L231 Difference]: Finished difference. Result has 214 places, 251 transitions, 3324 flow [2024-05-12 12:47:55,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3324, PETRI_PLACES=214, PETRI_TRANSITIONS=251} [2024-05-12 12:47:55,176 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-05-12 12:47:55,176 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 251 transitions, 3324 flow [2024-05-12 12:47:55,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:55,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:55,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:55,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 12:47:55,177 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:55,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1307715806, now seen corresponding path program 7 times [2024-05-12 12:47:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:55,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668080292] [2024-05-12 12:47:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:55,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:55,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668080292] [2024-05-12 12:47:55,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668080292] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:55,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:55,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:55,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602298645] [2024-05-12 12:47:55,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:55,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:55,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 251 transitions, 3324 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:55,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:55,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:55,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:55,869 INFO L124 PetriNetUnfolderBase]: 2787/4757 cut-off events. [2024-05-12 12:47:55,869 INFO L125 PetriNetUnfolderBase]: For 103651/103690 co-relation queries the response was YES. [2024-05-12 12:47:55,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25533 conditions, 4757 events. 2787/4757 cut-off events. For 103651/103690 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32442 event pairs, 965 based on Foata normal form. 16/4566 useless extension candidates. Maximal degree in co-relation 25436. Up to 4090 conditions per place. [2024-05-12 12:47:55,913 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 172 selfloop transitions, 83 changer transitions 0/269 dead transitions. [2024-05-12 12:47:55,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 269 transitions, 4020 flow [2024-05-12 12:47:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 12:47:55,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-05-12 12:47:55,915 INFO L175 Difference]: Start difference. First operand has 214 places, 251 transitions, 3324 flow. Second operand 7 states and 183 transitions. [2024-05-12 12:47:55,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 269 transitions, 4020 flow [2024-05-12 12:47:56,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 269 transitions, 3858 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:56,198 INFO L231 Difference]: Finished difference. Result has 217 places, 254 transitions, 3382 flow [2024-05-12 12:47:56,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3382, PETRI_PLACES=217, PETRI_TRANSITIONS=254} [2024-05-12 12:47:56,198 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 167 predicate places. [2024-05-12 12:47:56,198 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 254 transitions, 3382 flow [2024-05-12 12:47:56,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:56,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:56,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:56,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 12:47:56,199 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:56,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash -961070550, now seen corresponding path program 8 times [2024-05-12 12:47:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:56,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240151774] [2024-05-12 12:47:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:56,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240151774] [2024-05-12 12:47:56,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240151774] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:56,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:56,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:56,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438317372] [2024-05-12 12:47:56,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:56,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:56,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:56,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:56,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:56,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 254 transitions, 3382 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:56,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:56,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:56,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:56,927 INFO L124 PetriNetUnfolderBase]: 2784/4748 cut-off events. [2024-05-12 12:47:56,927 INFO L125 PetriNetUnfolderBase]: For 105109/105151 co-relation queries the response was YES. [2024-05-12 12:47:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25495 conditions, 4748 events. 2784/4748 cut-off events. For 105109/105151 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32394 event pairs, 958 based on Foata normal form. 16/4557 useless extension candidates. Maximal degree in co-relation 25397. Up to 4117 conditions per place. [2024-05-12 12:47:56,968 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 201 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2024-05-12 12:47:56,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 274 transitions, 4056 flow [2024-05-12 12:47:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 12:47:56,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 12:47:56,969 INFO L175 Difference]: Start difference. First operand has 217 places, 254 transitions, 3382 flow. Second operand 6 states and 168 transitions. [2024-05-12 12:47:56,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 274 transitions, 4056 flow [2024-05-12 12:47:57,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 274 transitions, 3900 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:57,227 INFO L231 Difference]: Finished difference. Result has 219 places, 254 transitions, 3354 flow [2024-05-12 12:47:57,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3354, PETRI_PLACES=219, PETRI_TRANSITIONS=254} [2024-05-12 12:47:57,228 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 169 predicate places. [2024-05-12 12:47:57,228 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 254 transitions, 3354 flow [2024-05-12 12:47:57,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:57,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:57,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:57,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 12:47:57,229 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:57,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 749827754, now seen corresponding path program 9 times [2024-05-12 12:47:57,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:57,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809766804] [2024-05-12 12:47:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:57,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809766804] [2024-05-12 12:47:57,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809766804] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:57,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:57,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:57,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23983538] [2024-05-12 12:47:57,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:57,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:57,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 254 transitions, 3354 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:57,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:57,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:58,067 INFO L124 PetriNetUnfolderBase]: 2781/4746 cut-off events. [2024-05-12 12:47:58,067 INFO L125 PetriNetUnfolderBase]: For 106157/106184 co-relation queries the response was YES. [2024-05-12 12:47:58,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 4746 events. 2781/4746 cut-off events. For 106157/106184 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32266 event pairs, 940 based on Foata normal form. 1/4537 useless extension candidates. Maximal degree in co-relation 25302. Up to 4114 conditions per place. [2024-05-12 12:47:58,107 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 208 selfloop transitions, 62 changer transitions 0/284 dead transitions. [2024-05-12 12:47:58,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 284 transitions, 3970 flow [2024-05-12 12:47:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:47:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:47:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 12:47:58,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 12:47:58,114 INFO L175 Difference]: Start difference. First operand has 219 places, 254 transitions, 3354 flow. Second operand 8 states and 219 transitions. [2024-05-12 12:47:58,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 284 transitions, 3970 flow [2024-05-12 12:47:58,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 284 transitions, 3756 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-05-12 12:47:58,513 INFO L231 Difference]: Finished difference. Result has 219 places, 254 transitions, 3278 flow [2024-05-12 12:47:58,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3278, PETRI_PLACES=219, PETRI_TRANSITIONS=254} [2024-05-12 12:47:58,514 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 169 predicate places. [2024-05-12 12:47:58,514 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 254 transitions, 3278 flow [2024-05-12 12:47:58,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:58,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:58,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 12:47:58,515 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:58,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1289583482, now seen corresponding path program 4 times [2024-05-12 12:47:58,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:58,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182016570] [2024-05-12 12:47:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:58,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:58,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182016570] [2024-05-12 12:47:58,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182016570] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:58,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:58,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851194776] [2024-05-12 12:47:58,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:58,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:58,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:58,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:58,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 254 transitions, 3278 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:58,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:58,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:58,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:59,279 INFO L124 PetriNetUnfolderBase]: 2828/4833 cut-off events. [2024-05-12 12:47:59,279 INFO L125 PetriNetUnfolderBase]: For 110842/110869 co-relation queries the response was YES. [2024-05-12 12:47:59,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25948 conditions, 4833 events. 2828/4833 cut-off events. For 110842/110869 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32959 event pairs, 942 based on Foata normal form. 2/4626 useless extension candidates. Maximal degree in co-relation 25849. Up to 4166 conditions per place. [2024-05-12 12:47:59,324 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 223 selfloop transitions, 48 changer transitions 0/285 dead transitions. [2024-05-12 12:47:59,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 285 transitions, 4062 flow [2024-05-12 12:47:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:47:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:47:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 12:47:59,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 12:47:59,325 INFO L175 Difference]: Start difference. First operand has 219 places, 254 transitions, 3278 flow. Second operand 7 states and 191 transitions. [2024-05-12 12:47:59,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 285 transitions, 4062 flow [2024-05-12 12:47:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 285 transitions, 3892 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-05-12 12:47:59,748 INFO L231 Difference]: Finished difference. Result has 217 places, 258 transitions, 3281 flow [2024-05-12 12:47:59,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3281, PETRI_PLACES=217, PETRI_TRANSITIONS=258} [2024-05-12 12:47:59,748 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 167 predicate places. [2024-05-12 12:47:59,749 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 258 transitions, 3281 flow [2024-05-12 12:47:59,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:59,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:59,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:59,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 12:47:59,749 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:47:59,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1286726522, now seen corresponding path program 5 times [2024-05-12 12:47:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515063719] [2024-05-12 12:47:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515063719] [2024-05-12 12:47:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515063719] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:59,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206984874] [2024-05-12 12:47:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:47:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:47:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:47:59,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:47:59,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 258 transitions, 3281 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:59,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:59,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:47:59,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:00,489 INFO L124 PetriNetUnfolderBase]: 2849/4860 cut-off events. [2024-05-12 12:48:00,489 INFO L125 PetriNetUnfolderBase]: For 109088/109112 co-relation queries the response was YES. [2024-05-12 12:48:00,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26281 conditions, 4860 events. 2849/4860 cut-off events. For 109088/109112 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33242 event pairs, 970 based on Foata normal form. 2/4647 useless extension candidates. Maximal degree in co-relation 26182. Up to 4253 conditions per place. [2024-05-12 12:48:00,533 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 221 selfloop transitions, 45 changer transitions 0/280 dead transitions. [2024-05-12 12:48:00,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 280 transitions, 3901 flow [2024-05-12 12:48:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 12:48:00,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 12:48:00,534 INFO L175 Difference]: Start difference. First operand has 217 places, 258 transitions, 3281 flow. Second operand 7 states and 184 transitions. [2024-05-12 12:48:00,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 280 transitions, 3901 flow [2024-05-12 12:48:00,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 280 transitions, 3791 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:00,927 INFO L231 Difference]: Finished difference. Result has 221 places, 260 transitions, 3306 flow [2024-05-12 12:48:00,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3306, PETRI_PLACES=221, PETRI_TRANSITIONS=260} [2024-05-12 12:48:00,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 171 predicate places. [2024-05-12 12:48:00,927 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 260 transitions, 3306 flow [2024-05-12 12:48:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:00,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:00,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 12:48:00,929 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:00,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash 741886376, now seen corresponding path program 6 times [2024-05-12 12:48:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280104170] [2024-05-12 12:48:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:01,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280104170] [2024-05-12 12:48:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280104170] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:01,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042966638] [2024-05-12 12:48:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:01,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:01,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 260 transitions, 3306 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:01,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:01,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:01,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:01,685 INFO L124 PetriNetUnfolderBase]: 2870/4922 cut-off events. [2024-05-12 12:48:01,685 INFO L125 PetriNetUnfolderBase]: For 111502/111529 co-relation queries the response was YES. [2024-05-12 12:48:01,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26445 conditions, 4922 events. 2870/4922 cut-off events. For 111502/111529 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33847 event pairs, 754 based on Foata normal form. 2/4719 useless extension candidates. Maximal degree in co-relation 26344. Up to 3949 conditions per place. [2024-05-12 12:48:01,731 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 219 selfloop transitions, 66 changer transitions 0/299 dead transitions. [2024-05-12 12:48:01,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 299 transitions, 4292 flow [2024-05-12 12:48:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 12:48:01,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 12:48:01,733 INFO L175 Difference]: Start difference. First operand has 221 places, 260 transitions, 3306 flow. Second operand 7 states and 195 transitions. [2024-05-12 12:48:01,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 299 transitions, 4292 flow [2024-05-12 12:48:02,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 299 transitions, 4193 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:02,041 INFO L231 Difference]: Finished difference. Result has 224 places, 268 transitions, 3506 flow [2024-05-12 12:48:02,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3506, PETRI_PLACES=224, PETRI_TRANSITIONS=268} [2024-05-12 12:48:02,042 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 174 predicate places. [2024-05-12 12:48:02,042 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 268 transitions, 3506 flow [2024-05-12 12:48:02,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:02,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:02,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:02,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 12:48:02,043 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:02,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1631474554, now seen corresponding path program 7 times [2024-05-12 12:48:02,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:02,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84099382] [2024-05-12 12:48:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:02,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:02,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84099382] [2024-05-12 12:48:02,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84099382] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:02,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:02,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:02,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109002650] [2024-05-12 12:48:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:02,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:02,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:02,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:02,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 268 transitions, 3506 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:02,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:02,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:02,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:02,836 INFO L124 PetriNetUnfolderBase]: 2891/5009 cut-off events. [2024-05-12 12:48:02,837 INFO L125 PetriNetUnfolderBase]: For 117973/118000 co-relation queries the response was YES. [2024-05-12 12:48:02,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27565 conditions, 5009 events. 2891/5009 cut-off events. For 117973/118000 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34794 event pairs, 757 based on Foata normal form. 2/4808 useless extension candidates. Maximal degree in co-relation 27462. Up to 3969 conditions per place. [2024-05-12 12:48:02,884 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 215 selfloop transitions, 69 changer transitions 0/298 dead transitions. [2024-05-12 12:48:02,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 298 transitions, 4317 flow [2024-05-12 12:48:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 12:48:02,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 12:48:02,886 INFO L175 Difference]: Start difference. First operand has 224 places, 268 transitions, 3506 flow. Second operand 7 states and 191 transitions. [2024-05-12 12:48:02,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 298 transitions, 4317 flow [2024-05-12 12:48:03,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 298 transitions, 4173 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-05-12 12:48:03,182 INFO L231 Difference]: Finished difference. Result has 229 places, 271 transitions, 3566 flow [2024-05-12 12:48:03,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3566, PETRI_PLACES=229, PETRI_TRANSITIONS=271} [2024-05-12 12:48:03,182 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 179 predicate places. [2024-05-12 12:48:03,182 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 271 transitions, 3566 flow [2024-05-12 12:48:03,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:03,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:03,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 12:48:03,183 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:03,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1105493126, now seen corresponding path program 8 times [2024-05-12 12:48:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:03,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526228497] [2024-05-12 12:48:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:03,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526228497] [2024-05-12 12:48:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526228497] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:03,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203815495] [2024-05-12 12:48:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:03,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:03,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:03,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:03,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 271 transitions, 3566 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:03,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:03,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:03,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:03,949 INFO L124 PetriNetUnfolderBase]: 2912/4981 cut-off events. [2024-05-12 12:48:03,949 INFO L125 PetriNetUnfolderBase]: For 117896/117923 co-relation queries the response was YES. [2024-05-12 12:48:03,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27437 conditions, 4981 events. 2912/4981 cut-off events. For 117896/117923 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34377 event pairs, 983 based on Foata normal form. 2/4764 useless extension candidates. Maximal degree in co-relation 27332. Up to 4346 conditions per place. [2024-05-12 12:48:03,995 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 231 selfloop transitions, 45 changer transitions 0/290 dead transitions. [2024-05-12 12:48:03,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 290 transitions, 4196 flow [2024-05-12 12:48:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-05-12 12:48:03,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562111801242236 [2024-05-12 12:48:03,997 INFO L175 Difference]: Start difference. First operand has 229 places, 271 transitions, 3566 flow. Second operand 7 states and 181 transitions. [2024-05-12 12:48:03,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 290 transitions, 4196 flow [2024-05-12 12:48:04,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 290 transitions, 4082 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:04,379 INFO L231 Difference]: Finished difference. Result has 233 places, 273 transitions, 3585 flow [2024-05-12 12:48:04,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3585, PETRI_PLACES=233, PETRI_TRANSITIONS=273} [2024-05-12 12:48:04,379 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 183 predicate places. [2024-05-12 12:48:04,380 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 273 transitions, 3585 flow [2024-05-12 12:48:04,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:04,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:04,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 12:48:04,380 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:04,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1412623268, now seen corresponding path program 9 times [2024-05-12 12:48:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:04,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770613931] [2024-05-12 12:48:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:04,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770613931] [2024-05-12 12:48:04,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770613931] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:04,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:04,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:04,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767435392] [2024-05-12 12:48:04,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:04,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:04,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:04,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:04,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 273 transitions, 3585 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:04,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:04,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:04,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:05,169 INFO L124 PetriNetUnfolderBase]: 2933/5026 cut-off events. [2024-05-12 12:48:05,169 INFO L125 PetriNetUnfolderBase]: For 120951/120978 co-relation queries the response was YES. [2024-05-12 12:48:05,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27358 conditions, 5026 events. 2933/5026 cut-off events. For 120951/120978 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34843 event pairs, 983 based on Foata normal form. 2/4809 useless extension candidates. Maximal degree in co-relation 27252. Up to 4314 conditions per place. [2024-05-12 12:48:05,216 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 230 selfloop transitions, 52 changer transitions 0/296 dead transitions. [2024-05-12 12:48:05,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 296 transitions, 4241 flow [2024-05-12 12:48:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:48:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:48:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 12:48:05,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 12:48:05,218 INFO L175 Difference]: Start difference. First operand has 233 places, 273 transitions, 3585 flow. Second operand 7 states and 184 transitions. [2024-05-12 12:48:05,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 296 transitions, 4241 flow [2024-05-12 12:48:05,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 296 transitions, 4138 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:05,538 INFO L231 Difference]: Finished difference. Result has 236 places, 276 transitions, 3647 flow [2024-05-12 12:48:05,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3647, PETRI_PLACES=236, PETRI_TRANSITIONS=276} [2024-05-12 12:48:05,539 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-05-12 12:48:05,539 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 276 transitions, 3647 flow [2024-05-12 12:48:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:05,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 12:48:05,540 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:05,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -961063606, now seen corresponding path program 10 times [2024-05-12 12:48:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:05,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302118221] [2024-05-12 12:48:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:05,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:05,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:05,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302118221] [2024-05-12 12:48:05,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302118221] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:05,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:05,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:05,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849948270] [2024-05-12 12:48:05,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:05,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:05,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:05,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:05,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:05,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 276 transitions, 3647 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:05,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:05,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:05,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:06,428 INFO L124 PetriNetUnfolderBase]: 2928/5041 cut-off events. [2024-05-12 12:48:06,428 INFO L125 PetriNetUnfolderBase]: For 121791/121830 co-relation queries the response was YES. [2024-05-12 12:48:06,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27414 conditions, 5041 events. 2928/5041 cut-off events. For 121791/121830 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35128 event pairs, 990 based on Foata normal form. 17/4844 useless extension candidates. Maximal degree in co-relation 27306. Up to 4318 conditions per place. [2024-05-12 12:48:06,473 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 233 selfloop transitions, 51 changer transitions 0/298 dead transitions. [2024-05-12 12:48:06,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 298 transitions, 4273 flow [2024-05-12 12:48:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 12:48:06,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-05-12 12:48:06,475 INFO L175 Difference]: Start difference. First operand has 236 places, 276 transitions, 3647 flow. Second operand 6 states and 169 transitions. [2024-05-12 12:48:06,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 298 transitions, 4273 flow [2024-05-12 12:48:06,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 298 transitions, 4152 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:06,923 INFO L231 Difference]: Finished difference. Result has 238 places, 276 transitions, 3636 flow [2024-05-12 12:48:06,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3636, PETRI_PLACES=238, PETRI_TRANSITIONS=276} [2024-05-12 12:48:06,925 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 188 predicate places. [2024-05-12 12:48:06,925 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 276 transitions, 3636 flow [2024-05-12 12:48:06,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:06,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:06,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:06,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 12:48:06,926 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:06,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash 986306728, now seen corresponding path program 11 times [2024-05-12 12:48:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:06,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932705772] [2024-05-12 12:48:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:07,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:07,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932705772] [2024-05-12 12:48:07,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932705772] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:07,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:07,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:07,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708355485] [2024-05-12 12:48:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:07,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:07,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:07,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:07,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 276 transitions, 3636 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:07,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:07,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:07,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:07,768 INFO L124 PetriNetUnfolderBase]: 2923/5153 cut-off events. [2024-05-12 12:48:07,769 INFO L125 PetriNetUnfolderBase]: For 121421/121460 co-relation queries the response was YES. [2024-05-12 12:48:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27319 conditions, 5153 events. 2923/5153 cut-off events. For 121421/121460 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36527 event pairs, 788 based on Foata normal form. 17/4964 useless extension candidates. Maximal degree in co-relation 27210. Up to 3857 conditions per place. [2024-05-12 12:48:07,817 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 225 selfloop transitions, 66 changer transitions 0/305 dead transitions. [2024-05-12 12:48:07,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 305 transitions, 4436 flow [2024-05-12 12:48:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:48:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:48:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 12:48:07,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 12:48:07,818 INFO L175 Difference]: Start difference. First operand has 238 places, 276 transitions, 3636 flow. Second operand 6 states and 176 transitions. [2024-05-12 12:48:07,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 305 transitions, 4436 flow [2024-05-12 12:48:08,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 4310 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:08,239 INFO L231 Difference]: Finished difference. Result has 239 places, 276 transitions, 3650 flow [2024-05-12 12:48:08,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3650, PETRI_PLACES=239, PETRI_TRANSITIONS=276} [2024-05-12 12:48:08,240 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-05-12 12:48:08,240 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 276 transitions, 3650 flow [2024-05-12 12:48:08,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:08,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 12:48:08,240 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:08,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash 732979206, now seen corresponding path program 12 times [2024-05-12 12:48:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340332210] [2024-05-12 12:48:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:08,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340332210] [2024-05-12 12:48:08,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340332210] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:08,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:08,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:48:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72511773] [2024-05-12 12:48:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:08,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:48:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:48:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:48:08,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:08,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 276 transitions, 3650 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:08,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:08,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:08,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:09,185 INFO L124 PetriNetUnfolderBase]: 2918/5029 cut-off events. [2024-05-12 12:48:09,185 INFO L125 PetriNetUnfolderBase]: For 121301/121325 co-relation queries the response was YES. [2024-05-12 12:48:09,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27308 conditions, 5029 events. 2918/5029 cut-off events. For 121301/121325 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34980 event pairs, 963 based on Foata normal form. 2/4812 useless extension candidates. Maximal degree in co-relation 27198. Up to 3990 conditions per place. [2024-05-12 12:48:09,234 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 240 selfloop transitions, 58 changer transitions 0/312 dead transitions. [2024-05-12 12:48:09,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 312 transitions, 4364 flow [2024-05-12 12:48:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-05-12 12:48:09,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-05-12 12:48:09,236 INFO L175 Difference]: Start difference. First operand has 239 places, 276 transitions, 3650 flow. Second operand 8 states and 223 transitions. [2024-05-12 12:48:09,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 312 transitions, 4364 flow [2024-05-12 12:48:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 312 transitions, 4212 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:09,690 INFO L231 Difference]: Finished difference. Result has 242 places, 276 transitions, 3634 flow [2024-05-12 12:48:09,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3634, PETRI_PLACES=242, PETRI_TRANSITIONS=276} [2024-05-12 12:48:09,691 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-05-12 12:48:09,691 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 276 transitions, 3634 flow [2024-05-12 12:48:09,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:09,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:09,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 12:48:09,692 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:09,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash 727048722, now seen corresponding path program 1 times [2024-05-12 12:48:09,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:09,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270262012] [2024-05-12 12:48:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:09,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:09,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:09,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270262012] [2024-05-12 12:48:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270262012] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:09,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:09,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774757154] [2024-05-12 12:48:09,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:09,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:09,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 276 transitions, 3634 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:09,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:09,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:09,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:10,653 INFO L124 PetriNetUnfolderBase]: 2926/5011 cut-off events. [2024-05-12 12:48:10,653 INFO L125 PetriNetUnfolderBase]: For 122521/122545 co-relation queries the response was YES. [2024-05-12 12:48:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27293 conditions, 5011 events. 2926/5011 cut-off events. For 122521/122545 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34649 event pairs, 987 based on Foata normal form. 1/4789 useless extension candidates. Maximal degree in co-relation 27183. Up to 4346 conditions per place. [2024-05-12 12:48:10,700 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 228 selfloop transitions, 65 changer transitions 0/307 dead transitions. [2024-05-12 12:48:10,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 307 transitions, 4472 flow [2024-05-12 12:48:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 12:48:10,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:48:10,701 INFO L175 Difference]: Start difference. First operand has 242 places, 276 transitions, 3634 flow. Second operand 8 states and 216 transitions. [2024-05-12 12:48:10,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 307 transitions, 4472 flow [2024-05-12 12:48:11,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 307 transitions, 4370 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:11,239 INFO L231 Difference]: Finished difference. Result has 244 places, 279 transitions, 3738 flow [2024-05-12 12:48:11,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3738, PETRI_PLACES=244, PETRI_TRANSITIONS=279} [2024-05-12 12:48:11,240 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-05-12 12:48:11,240 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 279 transitions, 3738 flow [2024-05-12 12:48:11,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:11,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:11,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 12:48:11,240 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:11,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1972435040, now seen corresponding path program 1 times [2024-05-12 12:48:11,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:11,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946606425] [2024-05-12 12:48:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:11,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:11,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946606425] [2024-05-12 12:48:11,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946606425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:11,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:11,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:11,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767875324] [2024-05-12 12:48:11,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:11,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:11,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:11,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:11,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 279 transitions, 3738 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:11,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:11,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:11,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:12,153 INFO L124 PetriNetUnfolderBase]: 3138/5418 cut-off events. [2024-05-12 12:48:12,153 INFO L125 PetriNetUnfolderBase]: For 133877/133901 co-relation queries the response was YES. [2024-05-12 12:48:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28891 conditions, 5418 events. 3138/5418 cut-off events. For 133877/133901 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38161 event pairs, 933 based on Foata normal form. 6/5190 useless extension candidates. Maximal degree in co-relation 28780. Up to 4260 conditions per place. [2024-05-12 12:48:12,202 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 265 selfloop transitions, 46 changer transitions 0/325 dead transitions. [2024-05-12 12:48:12,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 325 transitions, 4674 flow [2024-05-12 12:48:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 12:48:12,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-05-12 12:48:12,204 INFO L175 Difference]: Start difference. First operand has 244 places, 279 transitions, 3738 flow. Second operand 8 states and 225 transitions. [2024-05-12 12:48:12,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 325 transitions, 4674 flow [2024-05-12 12:48:12,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 325 transitions, 4424 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:12,849 INFO L231 Difference]: Finished difference. Result has 247 places, 283 transitions, 3659 flow [2024-05-12 12:48:12,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3659, PETRI_PLACES=247, PETRI_TRANSITIONS=283} [2024-05-12 12:48:12,849 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 197 predicate places. [2024-05-12 12:48:12,849 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 283 transitions, 3659 flow [2024-05-12 12:48:12,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:12,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:12,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:12,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 12:48:12,850 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:12,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1965948290, now seen corresponding path program 2 times [2024-05-12 12:48:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37303105] [2024-05-12 12:48:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:12,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37303105] [2024-05-12 12:48:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37303105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767718330] [2024-05-12 12:48:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:12,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:12,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:12,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:13,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:13,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 283 transitions, 3659 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:13,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:13,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:13,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:13,795 INFO L124 PetriNetUnfolderBase]: 3299/5681 cut-off events. [2024-05-12 12:48:13,795 INFO L125 PetriNetUnfolderBase]: For 141509/141536 co-relation queries the response was YES. [2024-05-12 12:48:13,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30734 conditions, 5681 events. 3299/5681 cut-off events. For 141509/141536 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40334 event pairs, 1113 based on Foata normal form. 6/5442 useless extension candidates. Maximal degree in co-relation 30623. Up to 4799 conditions per place. [2024-05-12 12:48:13,849 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 267 selfloop transitions, 47 changer transitions 0/328 dead transitions. [2024-05-12 12:48:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 328 transitions, 4578 flow [2024-05-12 12:48:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 12:48:13,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 12:48:13,850 INFO L175 Difference]: Start difference. First operand has 247 places, 283 transitions, 3659 flow. Second operand 8 states and 219 transitions. [2024-05-12 12:48:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 328 transitions, 4578 flow [2024-05-12 12:48:14,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 328 transitions, 4460 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:14,460 INFO L231 Difference]: Finished difference. Result has 251 places, 292 transitions, 3811 flow [2024-05-12 12:48:14,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3811, PETRI_PLACES=251, PETRI_TRANSITIONS=292} [2024-05-12 12:48:14,461 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-05-12 12:48:14,461 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 292 transitions, 3811 flow [2024-05-12 12:48:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 12:48:14,462 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:14,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash 845953554, now seen corresponding path program 2 times [2024-05-12 12:48:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318559867] [2024-05-12 12:48:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:14,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:14,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318559867] [2024-05-12 12:48:14,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318559867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:14,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:14,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:14,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476366032] [2024-05-12 12:48:14,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:14,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:14,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:14,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:14,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:14,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:14,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 292 transitions, 3811 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:14,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:14,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:14,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:15,367 INFO L124 PetriNetUnfolderBase]: 3318/5681 cut-off events. [2024-05-12 12:48:15,367 INFO L125 PetriNetUnfolderBase]: For 138196/138234 co-relation queries the response was YES. [2024-05-12 12:48:15,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30728 conditions, 5681 events. 3318/5681 cut-off events. For 138196/138234 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40254 event pairs, 1147 based on Foata normal form. 6/5435 useless extension candidates. Maximal degree in co-relation 30616. Up to 4762 conditions per place. [2024-05-12 12:48:15,422 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 168 selfloop transitions, 143 changer transitions 0/325 dead transitions. [2024-05-12 12:48:15,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 325 transitions, 5007 flow [2024-05-12 12:48:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 12:48:15,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 12:48:15,424 INFO L175 Difference]: Start difference. First operand has 251 places, 292 transitions, 3811 flow. Second operand 8 states and 219 transitions. [2024-05-12 12:48:15,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 325 transitions, 5007 flow [2024-05-12 12:48:15,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 325 transitions, 4909 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:15,814 INFO L231 Difference]: Finished difference. Result has 255 places, 298 transitions, 4141 flow [2024-05-12 12:48:15,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4141, PETRI_PLACES=255, PETRI_TRANSITIONS=298} [2024-05-12 12:48:15,814 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 205 predicate places. [2024-05-12 12:48:15,815 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 298 transitions, 4141 flow [2024-05-12 12:48:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:15,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:15,815 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] [2024-05-12 12:48:15,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 12:48:15,815 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:15,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1141528944, now seen corresponding path program 3 times [2024-05-12 12:48:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:15,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841019346] [2024-05-12 12:48:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:15,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841019346] [2024-05-12 12:48:15,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841019346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:15,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:15,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:15,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008671978] [2024-05-12 12:48:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:15,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:15,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:15,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:15,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 298 transitions, 4141 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:15,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:15,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:15,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:16,852 INFO L124 PetriNetUnfolderBase]: 3337/5704 cut-off events. [2024-05-12 12:48:16,853 INFO L125 PetriNetUnfolderBase]: For 144674/144715 co-relation queries the response was YES. [2024-05-12 12:48:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31210 conditions, 5704 events. 3337/5704 cut-off events. For 144674/144715 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40411 event pairs, 1140 based on Foata normal form. 6/5452 useless extension candidates. Maximal degree in co-relation 31097. Up to 4783 conditions per place. [2024-05-12 12:48:16,898 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 169 selfloop transitions, 145 changer transitions 0/328 dead transitions. [2024-05-12 12:48:16,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 328 transitions, 5353 flow [2024-05-12 12:48:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 12:48:16,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:48:16,899 INFO L175 Difference]: Start difference. First operand has 255 places, 298 transitions, 4141 flow. Second operand 8 states and 216 transitions. [2024-05-12 12:48:16,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 328 transitions, 5353 flow [2024-05-12 12:48:17,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 328 transitions, 4916 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:17,342 INFO L231 Difference]: Finished difference. Result has 258 places, 304 transitions, 4148 flow [2024-05-12 12:48:17,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4148, PETRI_PLACES=258, PETRI_TRANSITIONS=304} [2024-05-12 12:48:17,342 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-05-12 12:48:17,343 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 304 transitions, 4148 flow [2024-05-12 12:48:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:17,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:17,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 12:48:17,343 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:17,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1141172754, now seen corresponding path program 4 times [2024-05-12 12:48:17,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:17,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203616659] [2024-05-12 12:48:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203616659] [2024-05-12 12:48:17,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203616659] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:17,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:17,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:17,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318270169] [2024-05-12 12:48:17,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:17,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:17,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:17,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:17,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:17,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 304 transitions, 4148 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:17,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:17,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:17,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:18,260 INFO L124 PetriNetUnfolderBase]: 3334/5700 cut-off events. [2024-05-12 12:48:18,260 INFO L125 PetriNetUnfolderBase]: For 143745/143786 co-relation queries the response was YES. [2024-05-12 12:48:18,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31011 conditions, 5700 events. 3334/5700 cut-off events. For 143745/143786 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40412 event pairs, 1140 based on Foata normal form. 6/5448 useless extension candidates. Maximal degree in co-relation 30898. Up to 4780 conditions per place. [2024-05-12 12:48:18,315 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 143 changer transitions 0/327 dead transitions. [2024-05-12 12:48:18,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 327 transitions, 5086 flow [2024-05-12 12:48:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 12:48:18,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:48:18,317 INFO L175 Difference]: Start difference. First operand has 258 places, 304 transitions, 4148 flow. Second operand 8 states and 216 transitions. [2024-05-12 12:48:18,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 327 transitions, 5086 flow [2024-05-12 12:48:18,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 327 transitions, 4826 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:18,804 INFO L231 Difference]: Finished difference. Result has 262 places, 304 transitions, 4180 flow [2024-05-12 12:48:18,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4180, PETRI_PLACES=262, PETRI_TRANSITIONS=304} [2024-05-12 12:48:18,805 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 212 predicate places. [2024-05-12 12:48:18,805 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 304 transitions, 4180 flow [2024-05-12 12:48:18,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:18,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:18,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:18,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 12:48:18,806 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:18,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1014479572, now seen corresponding path program 5 times [2024-05-12 12:48:18,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:18,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509816416] [2024-05-12 12:48:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:18,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:18,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:18,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509816416] [2024-05-12 12:48:18,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509816416] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:18,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:18,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444725424] [2024-05-12 12:48:18,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:18,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:18,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:18,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 304 transitions, 4180 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:18,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:18,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:18,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:19,729 INFO L124 PetriNetUnfolderBase]: 3364/5748 cut-off events. [2024-05-12 12:48:19,729 INFO L125 PetriNetUnfolderBase]: For 152137/152167 co-relation queries the response was YES. [2024-05-12 12:48:19,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31503 conditions, 5748 events. 3364/5748 cut-off events. For 152137/152167 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40701 event pairs, 1139 based on Foata normal form. 1/5478 useless extension candidates. Maximal degree in co-relation 31389. Up to 5002 conditions per place. [2024-05-12 12:48:19,784 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 253 selfloop transitions, 67 changer transitions 0/334 dead transitions. [2024-05-12 12:48:19,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 334 transitions, 5304 flow [2024-05-12 12:48:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 12:48:19,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-05-12 12:48:19,785 INFO L175 Difference]: Start difference. First operand has 262 places, 304 transitions, 4180 flow. Second operand 8 states and 210 transitions. [2024-05-12 12:48:19,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 334 transitions, 5304 flow [2024-05-12 12:48:20,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 334 transitions, 4982 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 12:48:20,477 INFO L231 Difference]: Finished difference. Result has 263 places, 313 transitions, 4169 flow [2024-05-12 12:48:20,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4169, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2024-05-12 12:48:20,477 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-05-12 12:48:20,477 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 4169 flow [2024-05-12 12:48:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:20,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:20,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:20,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 12:48:20,478 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:20,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2059299570, now seen corresponding path program 6 times [2024-05-12 12:48:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420372311] [2024-05-12 12:48:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420372311] [2024-05-12 12:48:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420372311] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:20,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:20,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281168984] [2024-05-12 12:48:20,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:20,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:20,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:20,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:20,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:20,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 4169 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:20,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:20,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:20,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:21,416 INFO L124 PetriNetUnfolderBase]: 3361/5744 cut-off events. [2024-05-12 12:48:21,416 INFO L125 PetriNetUnfolderBase]: For 152339/152369 co-relation queries the response was YES. [2024-05-12 12:48:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31177 conditions, 5744 events. 3361/5744 cut-off events. For 152339/152369 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40639 event pairs, 1139 based on Foata normal form. 1/5474 useless extension candidates. Maximal degree in co-relation 31062. Up to 4999 conditions per place. [2024-05-12 12:48:21,469 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 252 selfloop transitions, 67 changer transitions 0/333 dead transitions. [2024-05-12 12:48:21,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 333 transitions, 4996 flow [2024-05-12 12:48:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 12:48:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 12:48:21,470 INFO L175 Difference]: Start difference. First operand has 263 places, 313 transitions, 4169 flow. Second operand 8 states and 209 transitions. [2024-05-12 12:48:21,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 333 transitions, 4996 flow [2024-05-12 12:48:22,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 333 transitions, 4892 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:22,284 INFO L231 Difference]: Finished difference. Result has 268 places, 313 transitions, 4205 flow [2024-05-12 12:48:22,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4205, PETRI_PLACES=268, PETRI_TRANSITIONS=313} [2024-05-12 12:48:22,284 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 218 predicate places. [2024-05-12 12:48:22,284 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 313 transitions, 4205 flow [2024-05-12 12:48:22,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:22,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:22,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:22,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 12:48:22,285 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:22,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1151090180, now seen corresponding path program 7 times [2024-05-12 12:48:22,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:22,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785681285] [2024-05-12 12:48:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:22,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:22,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785681285] [2024-05-12 12:48:22,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785681285] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:22,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:22,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:22,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052011690] [2024-05-12 12:48:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:22,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:22,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:22,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:22,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 313 transitions, 4205 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:22,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:22,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:22,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:23,240 INFO L124 PetriNetUnfolderBase]: 3358/5740 cut-off events. [2024-05-12 12:48:23,240 INFO L125 PetriNetUnfolderBase]: For 153471/153501 co-relation queries the response was YES. [2024-05-12 12:48:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31229 conditions, 5740 events. 3358/5740 cut-off events. For 153471/153501 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40669 event pairs, 1139 based on Foata normal form. 1/5470 useless extension candidates. Maximal degree in co-relation 31112. Up to 4996 conditions per place. [2024-05-12 12:48:23,296 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 251 selfloop transitions, 69 changer transitions 0/334 dead transitions. [2024-05-12 12:48:23,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 334 transitions, 4904 flow [2024-05-12 12:48:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:48:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:48:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-05-12 12:48:23,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 12:48:23,297 INFO L175 Difference]: Start difference. First operand has 268 places, 313 transitions, 4205 flow. Second operand 10 states and 250 transitions. [2024-05-12 12:48:23,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 334 transitions, 4904 flow [2024-05-12 12:48:23,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 334 transitions, 4754 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:23,876 INFO L231 Difference]: Finished difference. Result has 272 places, 313 transitions, 4199 flow [2024-05-12 12:48:23,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4199, PETRI_PLACES=272, PETRI_TRANSITIONS=313} [2024-05-12 12:48:23,876 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 222 predicate places. [2024-05-12 12:48:23,877 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 313 transitions, 4199 flow [2024-05-12 12:48:23,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:23,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:23,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:23,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 12:48:23,877 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:23,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash 291558544, now seen corresponding path program 3 times [2024-05-12 12:48:23,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:23,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018335692] [2024-05-12 12:48:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:23,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018335692] [2024-05-12 12:48:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018335692] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:23,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:23,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366072384] [2024-05-12 12:48:23,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:24,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:24,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 313 transitions, 4199 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:24,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:24,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:24,865 INFO L124 PetriNetUnfolderBase]: 3432/5869 cut-off events. [2024-05-12 12:48:24,865 INFO L125 PetriNetUnfolderBase]: For 169726/169753 co-relation queries the response was YES. [2024-05-12 12:48:24,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31968 conditions, 5869 events. 3432/5869 cut-off events. For 169726/169753 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41754 event pairs, 1141 based on Foata normal form. 6/5602 useless extension candidates. Maximal degree in co-relation 31850. Up to 4987 conditions per place. [2024-05-12 12:48:24,918 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 288 selfloop transitions, 45 changer transitions 0/347 dead transitions. [2024-05-12 12:48:24,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 347 transitions, 5040 flow [2024-05-12 12:48:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 12:48:24,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 12:48:24,919 INFO L175 Difference]: Start difference. First operand has 272 places, 313 transitions, 4199 flow. Second operand 8 states and 214 transitions. [2024-05-12 12:48:24,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 347 transitions, 5040 flow [2024-05-12 12:48:25,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 347 transitions, 4866 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-05-12 12:48:25,530 INFO L231 Difference]: Finished difference. Result has 272 places, 317 transitions, 4203 flow [2024-05-12 12:48:25,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4203, PETRI_PLACES=272, PETRI_TRANSITIONS=317} [2024-05-12 12:48:25,531 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 222 predicate places. [2024-05-12 12:48:25,531 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 317 transitions, 4203 flow [2024-05-12 12:48:25,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:25,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:25,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 12:48:25,532 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:25,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1558003488, now seen corresponding path program 1 times [2024-05-12 12:48:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849391336] [2024-05-12 12:48:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849391336] [2024-05-12 12:48:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849391336] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577940569] [2024-05-12 12:48:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:25,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:25,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 317 transitions, 4203 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:25,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:25,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:25,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:26,554 INFO L124 PetriNetUnfolderBase]: 3577/6140 cut-off events. [2024-05-12 12:48:26,554 INFO L125 PetriNetUnfolderBase]: For 195874/195912 co-relation queries the response was YES. [2024-05-12 12:48:26,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34025 conditions, 6140 events. 3577/6140 cut-off events. For 195874/195912 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44232 event pairs, 1194 based on Foata normal form. 11/5877 useless extension candidates. Maximal degree in co-relation 33904. Up to 5005 conditions per place. [2024-05-12 12:48:26,613 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 254 selfloop transitions, 90 changer transitions 0/358 dead transitions. [2024-05-12 12:48:26,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 358 transitions, 5199 flow [2024-05-12 12:48:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 12:48:26,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 12:48:26,615 INFO L175 Difference]: Start difference. First operand has 272 places, 317 transitions, 4203 flow. Second operand 8 states and 224 transitions. [2024-05-12 12:48:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 358 transitions, 5199 flow [2024-05-12 12:48:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 358 transitions, 5106 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:27,406 INFO L231 Difference]: Finished difference. Result has 277 places, 319 transitions, 4328 flow [2024-05-12 12:48:27,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4328, PETRI_PLACES=277, PETRI_TRANSITIONS=319} [2024-05-12 12:48:27,406 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 227 predicate places. [2024-05-12 12:48:27,407 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 319 transitions, 4328 flow [2024-05-12 12:48:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:27,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:27,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 12:48:27,407 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:27,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1141535888, now seen corresponding path program 2 times [2024-05-12 12:48:27,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:27,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474459163] [2024-05-12 12:48:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:27,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474459163] [2024-05-12 12:48:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474459163] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:27,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:27,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:27,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129953501] [2024-05-12 12:48:27,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:27,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:27,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:27,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 319 transitions, 4328 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:27,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:27,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:27,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:28,504 INFO L124 PetriNetUnfolderBase]: 3651/6242 cut-off events. [2024-05-12 12:48:28,504 INFO L125 PetriNetUnfolderBase]: For 207024/207065 co-relation queries the response was YES. [2024-05-12 12:48:28,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34815 conditions, 6242 events. 3651/6242 cut-off events. For 207024/207065 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45025 event pairs, 1262 based on Foata normal form. 13/5971 useless extension candidates. Maximal degree in co-relation 34693. Up to 5349 conditions per place. [2024-05-12 12:48:28,561 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 249 selfloop transitions, 84 changer transitions 0/347 dead transitions. [2024-05-12 12:48:28,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 347 transitions, 5106 flow [2024-05-12 12:48:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:48:28,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:48:28,562 INFO L175 Difference]: Start difference. First operand has 277 places, 319 transitions, 4328 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:48:28,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 347 transitions, 5106 flow [2024-05-12 12:48:29,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 347 transitions, 4996 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:29,392 INFO L231 Difference]: Finished difference. Result has 281 places, 320 transitions, 4411 flow [2024-05-12 12:48:29,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4411, PETRI_PLACES=281, PETRI_TRANSITIONS=320} [2024-05-12 12:48:29,393 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 231 predicate places. [2024-05-12 12:48:29,393 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 320 transitions, 4411 flow [2024-05-12 12:48:29,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:29,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:29,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:29,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 12:48:29,394 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:29,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1141388018, now seen corresponding path program 3 times [2024-05-12 12:48:29,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:29,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126079768] [2024-05-12 12:48:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:29,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:29,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:29,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126079768] [2024-05-12 12:48:29,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126079768] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:29,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:29,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:29,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340814671] [2024-05-12 12:48:29,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:29,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:29,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:29,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:29,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 320 transitions, 4411 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:29,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:29,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:29,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:30,443 INFO L124 PetriNetUnfolderBase]: 3704/6330 cut-off events. [2024-05-12 12:48:30,443 INFO L125 PetriNetUnfolderBase]: For 207686/207730 co-relation queries the response was YES. [2024-05-12 12:48:30,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35516 conditions, 6330 events. 3704/6330 cut-off events. For 207686/207730 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45771 event pairs, 1255 based on Foata normal form. 11/6056 useless extension candidates. Maximal degree in co-relation 35392. Up to 5355 conditions per place. [2024-05-12 12:48:30,504 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 253 selfloop transitions, 86 changer transitions 0/353 dead transitions. [2024-05-12 12:48:30,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 353 transitions, 5227 flow [2024-05-12 12:48:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-05-12 12:48:30,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-05-12 12:48:30,506 INFO L175 Difference]: Start difference. First operand has 281 places, 320 transitions, 4411 flow. Second operand 8 states and 218 transitions. [2024-05-12 12:48:30,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 353 transitions, 5227 flow [2024-05-12 12:48:31,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 353 transitions, 5054 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:31,357 INFO L231 Difference]: Finished difference. Result has 283 places, 321 transitions, 4436 flow [2024-05-12 12:48:31,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4436, PETRI_PLACES=283, PETRI_TRANSITIONS=321} [2024-05-12 12:48:31,358 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-05-12 12:48:31,358 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 321 transitions, 4436 flow [2024-05-12 12:48:31,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:31,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:31,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:31,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 12:48:31,359 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:31,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1260440720, now seen corresponding path program 4 times [2024-05-12 12:48:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:31,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238429845] [2024-05-12 12:48:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238429845] [2024-05-12 12:48:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238429845] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:31,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277117197] [2024-05-12 12:48:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:31,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:31,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 321 transitions, 4436 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:31,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:31,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:31,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:32,568 INFO L124 PetriNetUnfolderBase]: 3981/6811 cut-off events. [2024-05-12 12:48:32,568 INFO L125 PetriNetUnfolderBase]: For 289427/289463 co-relation queries the response was YES. [2024-05-12 12:48:32,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37795 conditions, 6811 events. 3981/6811 cut-off events. For 289427/289463 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50012 event pairs, 1446 based on Foata normal form. 34/6537 useless extension candidates. Maximal degree in co-relation 37670. Up to 5567 conditions per place. [2024-05-12 12:48:32,631 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 276 selfloop transitions, 58 changer transitions 0/348 dead transitions. [2024-05-12 12:48:32,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 348 transitions, 5226 flow [2024-05-12 12:48:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 12:48:32,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 12:48:32,632 INFO L175 Difference]: Start difference. First operand has 283 places, 321 transitions, 4436 flow. Second operand 8 states and 214 transitions. [2024-05-12 12:48:32,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 348 transitions, 5226 flow [2024-05-12 12:48:33,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 348 transitions, 5042 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:33,694 INFO L231 Difference]: Finished difference. Result has 285 places, 322 transitions, 4400 flow [2024-05-12 12:48:33,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4400, PETRI_PLACES=285, PETRI_TRANSITIONS=322} [2024-05-12 12:48:33,695 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-05-12 12:48:33,695 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 322 transitions, 4400 flow [2024-05-12 12:48:33,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:33,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:33,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 12:48:33,695 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:33,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1260292850, now seen corresponding path program 5 times [2024-05-12 12:48:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:33,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363327033] [2024-05-12 12:48:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:33,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363327033] [2024-05-12 12:48:33,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363327033] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:33,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:33,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:33,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794547611] [2024-05-12 12:48:33,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:33,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:33,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 322 transitions, 4400 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:33,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:33,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:35,004 INFO L124 PetriNetUnfolderBase]: 4562/7816 cut-off events. [2024-05-12 12:48:35,005 INFO L125 PetriNetUnfolderBase]: For 381756/381810 co-relation queries the response was YES. [2024-05-12 12:48:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44693 conditions, 7816 events. 4562/7816 cut-off events. For 381756/381810 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 58938 event pairs, 1646 based on Foata normal form. 30/7518 useless extension candidates. Maximal degree in co-relation 44567. Up to 5486 conditions per place. [2024-05-12 12:48:35,086 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 284 selfloop transitions, 61 changer transitions 0/359 dead transitions. [2024-05-12 12:48:35,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 359 transitions, 5442 flow [2024-05-12 12:48:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 12:48:35,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 12:48:35,087 INFO L175 Difference]: Start difference. First operand has 285 places, 322 transitions, 4400 flow. Second operand 8 states and 221 transitions. [2024-05-12 12:48:35,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 359 transitions, 5442 flow [2024-05-12 12:48:36,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 359 transitions, 5320 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 12:48:36,485 INFO L231 Difference]: Finished difference. Result has 287 places, 324 transitions, 4455 flow [2024-05-12 12:48:36,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4455, PETRI_PLACES=287, PETRI_TRANSITIONS=324} [2024-05-12 12:48:36,485 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 237 predicate places. [2024-05-12 12:48:36,486 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 324 transitions, 4455 flow [2024-05-12 12:48:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:36,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:36,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:36,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 12:48:36,486 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:36,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1459742510, now seen corresponding path program 6 times [2024-05-12 12:48:36,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:36,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552623935] [2024-05-12 12:48:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:36,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:36,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552623935] [2024-05-12 12:48:36,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552623935] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:36,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:36,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693827116] [2024-05-12 12:48:36,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:36,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:36,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:36,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:36,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:36,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 324 transitions, 4455 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:36,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:36,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:36,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:37,845 INFO L124 PetriNetUnfolderBase]: 4493/7713 cut-off events. [2024-05-12 12:48:37,845 INFO L125 PetriNetUnfolderBase]: For 309747/309813 co-relation queries the response was YES. [2024-05-12 12:48:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41786 conditions, 7713 events. 4493/7713 cut-off events. For 309747/309813 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58288 event pairs, 1792 based on Foata normal form. 34/7406 useless extension candidates. Maximal degree in co-relation 41659. Up to 6399 conditions per place. [2024-05-12 12:48:37,928 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 278 selfloop transitions, 60 changer transitions 0/352 dead transitions. [2024-05-12 12:48:37,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 352 transitions, 5235 flow [2024-05-12 12:48:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:48:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:48:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 12:48:37,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565217391304348 [2024-05-12 12:48:37,929 INFO L175 Difference]: Start difference. First operand has 287 places, 324 transitions, 4455 flow. Second operand 10 states and 256 transitions. [2024-05-12 12:48:37,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 352 transitions, 5235 flow [2024-05-12 12:48:39,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 352 transitions, 5145 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:39,016 INFO L231 Difference]: Finished difference. Result has 293 places, 324 transitions, 4493 flow [2024-05-12 12:48:39,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4493, PETRI_PLACES=293, PETRI_TRANSITIONS=324} [2024-05-12 12:48:39,016 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-05-12 12:48:39,016 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 324 transitions, 4493 flow [2024-05-12 12:48:39,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:39,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:39,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:39,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 12:48:39,017 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:39,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1008895046, now seen corresponding path program 1 times [2024-05-12 12:48:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:39,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264086254] [2024-05-12 12:48:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:39,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:39,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:39,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264086254] [2024-05-12 12:48:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264086254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:39,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:39,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568600571] [2024-05-12 12:48:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:39,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:39,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:39,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:39,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 324 transitions, 4493 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:39,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:39,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:39,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:40,403 INFO L124 PetriNetUnfolderBase]: 4728/8220 cut-off events. [2024-05-12 12:48:40,403 INFO L125 PetriNetUnfolderBase]: For 304423/304467 co-relation queries the response was YES. [2024-05-12 12:48:40,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43550 conditions, 8220 events. 4728/8220 cut-off events. For 304423/304467 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 63073 event pairs, 1818 based on Foata normal form. 30/7907 useless extension candidates. Maximal degree in co-relation 43421. Up to 5743 conditions per place. [2024-05-12 12:48:40,491 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 283 selfloop transitions, 66 changer transitions 0/363 dead transitions. [2024-05-12 12:48:40,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 363 transitions, 5401 flow [2024-05-12 12:48:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:48:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:48:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-05-12 12:48:40,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695652173913044 [2024-05-12 12:48:40,492 INFO L175 Difference]: Start difference. First operand has 293 places, 324 transitions, 4493 flow. Second operand 10 states and 262 transitions. [2024-05-12 12:48:40,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 363 transitions, 5401 flow [2024-05-12 12:48:41,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 363 transitions, 5265 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-05-12 12:48:41,772 INFO L231 Difference]: Finished difference. Result has 295 places, 327 transitions, 4570 flow [2024-05-12 12:48:41,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4570, PETRI_PLACES=295, PETRI_TRANSITIONS=327} [2024-05-12 12:48:41,773 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 245 predicate places. [2024-05-12 12:48:41,773 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 327 transitions, 4570 flow [2024-05-12 12:48:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:41,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:41,773 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, 1] [2024-05-12 12:48:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 12:48:41,774 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash -863846732, now seen corresponding path program 8 times [2024-05-12 12:48:41,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:41,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484753577] [2024-05-12 12:48:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:41,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484753577] [2024-05-12 12:48:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484753577] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:41,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:41,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912009230] [2024-05-12 12:48:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:41,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:41,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:41,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 327 transitions, 4570 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:41,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:41,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:41,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:43,052 INFO L124 PetriNetUnfolderBase]: 4736/8153 cut-off events. [2024-05-12 12:48:43,052 INFO L125 PetriNetUnfolderBase]: For 232989/233071 co-relation queries the response was YES. [2024-05-12 12:48:43,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44029 conditions, 8153 events. 4736/8153 cut-off events. For 232989/233071 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 62738 event pairs, 2006 based on Foata normal form. 12/7818 useless extension candidates. Maximal degree in co-relation 43898. Up to 7014 conditions per place. [2024-05-12 12:48:43,136 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 179 selfloop transitions, 160 changer transitions 0/353 dead transitions. [2024-05-12 12:48:43,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 353 transitions, 5672 flow [2024-05-12 12:48:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 12:48:43,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 12:48:43,137 INFO L175 Difference]: Start difference. First operand has 295 places, 327 transitions, 4570 flow. Second operand 8 states and 215 transitions. [2024-05-12 12:48:43,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 353 transitions, 5672 flow [2024-05-12 12:48:44,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 353 transitions, 5590 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 12:48:44,198 INFO L231 Difference]: Finished difference. Result has 298 places, 330 transitions, 4878 flow [2024-05-12 12:48:44,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4878, PETRI_PLACES=298, PETRI_TRANSITIONS=330} [2024-05-12 12:48:44,199 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 248 predicate places. [2024-05-12 12:48:44,199 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 330 transitions, 4878 flow [2024-05-12 12:48:44,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:44,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:44,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 12:48:44,200 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:44,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash -855514862, now seen corresponding path program 9 times [2024-05-12 12:48:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:44,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656950659] [2024-05-12 12:48:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:44,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:44,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656950659] [2024-05-12 12:48:44,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656950659] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:44,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:44,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:44,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129096549] [2024-05-12 12:48:44,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:44,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:44,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:44,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:44,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:44,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:44,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 330 transitions, 4878 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:44,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:44,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:44,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:45,526 INFO L124 PetriNetUnfolderBase]: 4755/8176 cut-off events. [2024-05-12 12:48:45,526 INFO L125 PetriNetUnfolderBase]: For 241463/241548 co-relation queries the response was YES. [2024-05-12 12:48:45,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44727 conditions, 8176 events. 4755/8176 cut-off events. For 241463/241548 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 62667 event pairs, 1999 based on Foata normal form. 12/7835 useless extension candidates. Maximal degree in co-relation 44594. Up to 7035 conditions per place. [2024-05-12 12:48:45,617 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 183 selfloop transitions, 160 changer transitions 0/357 dead transitions. [2024-05-12 12:48:45,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 357 transitions, 6216 flow [2024-05-12 12:48:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 12:48:45,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 12:48:45,618 INFO L175 Difference]: Start difference. First operand has 298 places, 330 transitions, 4878 flow. Second operand 8 states and 215 transitions. [2024-05-12 12:48:45,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 357 transitions, 6216 flow [2024-05-12 12:48:46,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 357 transitions, 5665 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-05-12 12:48:46,845 INFO L231 Difference]: Finished difference. Result has 299 places, 336 transitions, 4793 flow [2024-05-12 12:48:46,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4375, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4793, PETRI_PLACES=299, PETRI_TRANSITIONS=336} [2024-05-12 12:48:46,846 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 249 predicate places. [2024-05-12 12:48:46,846 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 336 transitions, 4793 flow [2024-05-12 12:48:46,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:46,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:46,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:46,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 12:48:46,846 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:46,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1233673872, now seen corresponding path program 10 times [2024-05-12 12:48:46,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:46,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378169148] [2024-05-12 12:48:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378169148] [2024-05-12 12:48:46,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378169148] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:46,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721460971] [2024-05-12 12:48:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:46,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:46,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:47,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:47,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 336 transitions, 4793 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:47,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:47,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:47,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:48,182 INFO L124 PetriNetUnfolderBase]: 4752/8172 cut-off events. [2024-05-12 12:48:48,183 INFO L125 PetriNetUnfolderBase]: For 241137/241222 co-relation queries the response was YES. [2024-05-12 12:48:48,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44260 conditions, 8172 events. 4752/8172 cut-off events. For 241137/241222 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 62731 event pairs, 1999 based on Foata normal form. 12/7831 useless extension candidates. Maximal degree in co-relation 44127. Up to 7032 conditions per place. [2024-05-12 12:48:48,275 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 161 changer transitions 0/356 dead transitions. [2024-05-12 12:48:48,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 356 transitions, 5837 flow [2024-05-12 12:48:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:48:48,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:48:48,277 INFO L175 Difference]: Start difference. First operand has 299 places, 336 transitions, 4793 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:48:48,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 356 transitions, 5837 flow [2024-05-12 12:48:49,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 356 transitions, 5504 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 12:48:49,855 INFO L231 Difference]: Finished difference. Result has 303 places, 336 transitions, 4788 flow [2024-05-12 12:48:49,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4788, PETRI_PLACES=303, PETRI_TRANSITIONS=336} [2024-05-12 12:48:49,856 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-05-12 12:48:49,856 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 336 transitions, 4788 flow [2024-05-12 12:48:49,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:49,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:49,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 12:48:49,857 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:49,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:49,857 INFO L85 PathProgramCache]: Analyzing trace with hash -89654776, now seen corresponding path program 11 times [2024-05-12 12:48:49,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:49,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739100402] [2024-05-12 12:48:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:49,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:49,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739100402] [2024-05-12 12:48:49,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739100402] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:49,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:49,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993473798] [2024-05-12 12:48:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:49,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:49,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:50,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:50,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 336 transitions, 4788 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:50,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:50,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:50,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:51,225 INFO L124 PetriNetUnfolderBase]: 4782/8216 cut-off events. [2024-05-12 12:48:51,225 INFO L125 PetriNetUnfolderBase]: For 252801/252886 co-relation queries the response was YES. [2024-05-12 12:48:51,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44765 conditions, 8216 events. 4782/8216 cut-off events. For 252801/252886 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63110 event pairs, 1999 based on Foata normal form. 12/7866 useless extension candidates. Maximal degree in co-relation 44631. Up to 7065 conditions per place. [2024-05-12 12:48:51,316 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 179 selfloop transitions, 170 changer transitions 0/363 dead transitions. [2024-05-12 12:48:51,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 363 transitions, 6167 flow [2024-05-12 12:48:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 12:48:51,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 12:48:51,317 INFO L175 Difference]: Start difference. First operand has 303 places, 336 transitions, 4788 flow. Second operand 8 states and 212 transitions. [2024-05-12 12:48:51,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 363 transitions, 6167 flow [2024-05-12 12:48:52,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 363 transitions, 5819 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 12:48:52,850 INFO L231 Difference]: Finished difference. Result has 304 places, 345 transitions, 4951 flow [2024-05-12 12:48:52,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4951, PETRI_PLACES=304, PETRI_TRANSITIONS=345} [2024-05-12 12:48:52,851 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 254 predicate places. [2024-05-12 12:48:52,851 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 345 transitions, 4951 flow [2024-05-12 12:48:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:52,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:52,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 12:48:52,851 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:52,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash 310188494, now seen corresponding path program 12 times [2024-05-12 12:48:52,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:52,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72291203] [2024-05-12 12:48:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:53,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:53,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72291203] [2024-05-12 12:48:53,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72291203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:53,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:53,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:53,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450160283] [2024-05-12 12:48:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:53,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:53,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:53,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 345 transitions, 4951 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:53,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:53,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:53,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:54,463 INFO L124 PetriNetUnfolderBase]: 4779/8214 cut-off events. [2024-05-12 12:48:54,464 INFO L125 PetriNetUnfolderBase]: For 253438/253508 co-relation queries the response was YES. [2024-05-12 12:48:54,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44712 conditions, 8214 events. 4779/8214 cut-off events. For 253438/253508 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 62963 event pairs, 1973 based on Foata normal form. 1/7850 useless extension candidates. Maximal degree in co-relation 44577. Up to 7333 conditions per place. [2024-05-12 12:48:54,558 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 318 selfloop transitions, 28 changer transitions 0/360 dead transitions. [2024-05-12 12:48:54,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 360 transitions, 5679 flow [2024-05-12 12:48:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 12:48:54,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407608695652174 [2024-05-12 12:48:54,560 INFO L175 Difference]: Start difference. First operand has 304 places, 345 transitions, 4951 flow. Second operand 8 states and 199 transitions. [2024-05-12 12:48:54,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 360 transitions, 5679 flow [2024-05-12 12:48:55,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 360 transitions, 5395 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 12:48:55,984 INFO L231 Difference]: Finished difference. Result has 309 places, 345 transitions, 4729 flow [2024-05-12 12:48:56,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4667, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=309, PETRI_TRANSITIONS=345} [2024-05-12 12:48:56,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 259 predicate places. [2024-05-12 12:48:56,000 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 345 transitions, 4729 flow [2024-05-12 12:48:56,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:56,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:56,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:56,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 12:48:56,001 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:56,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -89665006, now seen corresponding path program 13 times [2024-05-12 12:48:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417063003] [2024-05-12 12:48:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417063003] [2024-05-12 12:48:56,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417063003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:56,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:56,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073199876] [2024-05-12 12:48:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:56,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:56,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:56,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 345 transitions, 4729 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:56,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:56,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:48:57,365 INFO L124 PetriNetUnfolderBase]: 4776/8213 cut-off events. [2024-05-12 12:48:57,366 INFO L125 PetriNetUnfolderBase]: For 255121/255203 co-relation queries the response was YES. [2024-05-12 12:48:57,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44191 conditions, 8213 events. 4776/8213 cut-off events. For 255121/255203 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63045 event pairs, 2006 based on Foata normal form. 12/7863 useless extension candidates. Maximal degree in co-relation 44055. Up to 7059 conditions per place. [2024-05-12 12:48:57,467 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 171 changer transitions 0/361 dead transitions. [2024-05-12 12:48:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 361 transitions, 5623 flow [2024-05-12 12:48:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:48:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:48:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 12:48:57,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 12:48:57,469 INFO L175 Difference]: Start difference. First operand has 309 places, 345 transitions, 4729 flow. Second operand 8 states and 209 transitions. [2024-05-12 12:48:57,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 361 transitions, 5623 flow [2024-05-12 12:48:59,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 361 transitions, 5535 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-05-12 12:48:59,041 INFO L231 Difference]: Finished difference. Result has 310 places, 345 transitions, 4989 flow [2024-05-12 12:48:59,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4989, PETRI_PLACES=310, PETRI_TRANSITIONS=345} [2024-05-12 12:48:59,041 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 260 predicate places. [2024-05-12 12:48:59,041 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 345 transitions, 4989 flow [2024-05-12 12:48:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:59,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:48:59,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:48:59,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 12:48:59,042 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:48:59,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:48:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash -580975572, now seen corresponding path program 14 times [2024-05-12 12:48:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:48:59,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896029571] [2024-05-12 12:48:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:48:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:48:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:48:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:48:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:48:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896029571] [2024-05-12 12:48:59,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896029571] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:48:59,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:48:59,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:48:59,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186860512] [2024-05-12 12:48:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:48:59,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:48:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:48:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:48:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:48:59,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:48:59,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 345 transitions, 4989 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:48:59,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:48:59,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:48:59,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:00,460 INFO L124 PetriNetUnfolderBase]: 4806/8254 cut-off events. [2024-05-12 12:49:00,460 INFO L125 PetriNetUnfolderBase]: For 268867/268937 co-relation queries the response was YES. [2024-05-12 12:49:00,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45186 conditions, 8254 events. 4806/8254 cut-off events. For 268867/268937 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63206 event pairs, 1973 based on Foata normal form. 1/7881 useless extension candidates. Maximal degree in co-relation 45049. Up to 7167 conditions per place. [2024-05-12 12:49:00,548 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 230 selfloop transitions, 138 changer transitions 0/382 dead transitions. [2024-05-12 12:49:00,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 382 transitions, 6307 flow [2024-05-12 12:49:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:49:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:49:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-05-12 12:49:00,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673913043478261 [2024-05-12 12:49:00,549 INFO L175 Difference]: Start difference. First operand has 310 places, 345 transitions, 4989 flow. Second operand 10 states and 261 transitions. [2024-05-12 12:49:00,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 382 transitions, 6307 flow [2024-05-12 12:49:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 382 transitions, 5943 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:01,798 INFO L231 Difference]: Finished difference. Result has 313 places, 354 transitions, 5097 flow [2024-05-12 12:49:01,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5097, PETRI_PLACES=313, PETRI_TRANSITIONS=354} [2024-05-12 12:49:01,799 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-05-12 12:49:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 354 transitions, 5097 flow [2024-05-12 12:49:01,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:01,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:01,799 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] [2024-05-12 12:49:01,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 12:49:01,800 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:01,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1502960056, now seen corresponding path program 15 times [2024-05-12 12:49:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:01,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036338099] [2024-05-12 12:49:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:01,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:01,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036338099] [2024-05-12 12:49:01,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036338099] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:01,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:01,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:01,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87011211] [2024-05-12 12:49:01,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:01,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:01,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:01,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:01,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 354 transitions, 5097 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:01,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:01,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:01,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:03,181 INFO L124 PetriNetUnfolderBase]: 4803/8255 cut-off events. [2024-05-12 12:49:03,181 INFO L125 PetriNetUnfolderBase]: For 269912/269979 co-relation queries the response was YES. [2024-05-12 12:49:03,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45025 conditions, 8255 events. 4803/8255 cut-off events. For 269912/269979 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63277 event pairs, 1980 based on Foata normal form. 1/7882 useless extension candidates. Maximal degree in co-relation 44887. Up to 7256 conditions per place. [2024-05-12 12:49:03,282 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 298 selfloop transitions, 73 changer transitions 0/385 dead transitions. [2024-05-12 12:49:03,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 385 transitions, 6083 flow [2024-05-12 12:49:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 12:49:03,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-05-12 12:49:03,284 INFO L175 Difference]: Start difference. First operand has 313 places, 354 transitions, 5097 flow. Second operand 8 states and 225 transitions. [2024-05-12 12:49:03,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 385 transitions, 6083 flow [2024-05-12 12:49:05,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 385 transitions, 5753 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-05-12 12:49:05,234 INFO L231 Difference]: Finished difference. Result has 313 places, 354 transitions, 4929 flow [2024-05-12 12:49:05,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4769, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4929, PETRI_PLACES=313, PETRI_TRANSITIONS=354} [2024-05-12 12:49:05,234 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-05-12 12:49:05,234 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 354 transitions, 4929 flow [2024-05-12 12:49:05,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:05,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:05,235 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, 1] [2024-05-12 12:49:05,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 12:49:05,235 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:05,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1083849994, now seen corresponding path program 16 times [2024-05-12 12:49:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:05,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702160178] [2024-05-12 12:49:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:05,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:05,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:05,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702160178] [2024-05-12 12:49:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702160178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:05,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:05,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:05,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245098016] [2024-05-12 12:49:05,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:05,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:05,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 354 transitions, 4929 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:05,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:05,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:05,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:06,672 INFO L124 PetriNetUnfolderBase]: 4800/8251 cut-off events. [2024-05-12 12:49:06,672 INFO L125 PetriNetUnfolderBase]: For 264833/264900 co-relation queries the response was YES. [2024-05-12 12:49:06,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44676 conditions, 8251 events. 4800/8251 cut-off events. For 264833/264900 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63240 event pairs, 1980 based on Foata normal form. 1/7878 useless extension candidates. Maximal degree in co-relation 44538. Up to 7253 conditions per place. [2024-05-12 12:49:06,764 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 294 selfloop transitions, 73 changer transitions 0/381 dead transitions. [2024-05-12 12:49:06,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 381 transitions, 5897 flow [2024-05-12 12:49:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:49:06,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 12:49:06,765 INFO L175 Difference]: Start difference. First operand has 313 places, 354 transitions, 4929 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:49:06,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 381 transitions, 5897 flow [2024-05-12 12:49:08,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 381 transitions, 5660 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-05-12 12:49:08,679 INFO L231 Difference]: Finished difference. Result has 311 places, 354 transitions, 4854 flow [2024-05-12 12:49:08,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4854, PETRI_PLACES=311, PETRI_TRANSITIONS=354} [2024-05-12 12:49:08,680 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 261 predicate places. [2024-05-12 12:49:08,680 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 354 transitions, 4854 flow [2024-05-12 12:49:08,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:08,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:08,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:08,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 12:49:08,680 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:08,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:08,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1083672364, now seen corresponding path program 17 times [2024-05-12 12:49:08,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:08,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804902293] [2024-05-12 12:49:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:08,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804902293] [2024-05-12 12:49:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804902293] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:08,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:08,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955934466] [2024-05-12 12:49:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:08,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:08,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:08,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 354 transitions, 4854 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:08,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:08,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:08,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:10,211 INFO L124 PetriNetUnfolderBase]: 4797/8247 cut-off events. [2024-05-12 12:49:10,212 INFO L125 PetriNetUnfolderBase]: For 260303/260370 co-relation queries the response was YES. [2024-05-12 12:49:10,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44480 conditions, 8247 events. 4797/8247 cut-off events. For 260303/260370 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63237 event pairs, 1980 based on Foata normal form. 1/7874 useless extension candidates. Maximal degree in co-relation 44344. Up to 7313 conditions per place. [2024-05-12 12:49:10,289 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 321 selfloop transitions, 44 changer transitions 0/379 dead transitions. [2024-05-12 12:49:10,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 379 transitions, 5648 flow [2024-05-12 12:49:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 12:49:10,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-05-12 12:49:10,290 INFO L175 Difference]: Start difference. First operand has 311 places, 354 transitions, 4854 flow. Second operand 6 states and 173 transitions. [2024-05-12 12:49:10,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 379 transitions, 5648 flow [2024-05-12 12:49:11,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 379 transitions, 5387 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:11,630 INFO L231 Difference]: Finished difference. Result has 310 places, 354 transitions, 4700 flow [2024-05-12 12:49:11,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4700, PETRI_PLACES=310, PETRI_TRANSITIONS=354} [2024-05-12 12:49:11,630 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 260 predicate places. [2024-05-12 12:49:11,630 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 354 transitions, 4700 flow [2024-05-12 12:49:11,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:11,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:11,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 12:49:11,631 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:11,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash -277337390, now seen corresponding path program 18 times [2024-05-12 12:49:11,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:11,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680850920] [2024-05-12 12:49:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:11,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680850920] [2024-05-12 12:49:11,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680850920] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:11,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578083771] [2024-05-12 12:49:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:11,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 354 transitions, 4700 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:11,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:11,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:11,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:13,005 INFO L124 PetriNetUnfolderBase]: 4805/8257 cut-off events. [2024-05-12 12:49:13,005 INFO L125 PetriNetUnfolderBase]: For 265324/265403 co-relation queries the response was YES. [2024-05-12 12:49:13,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44454 conditions, 8257 events. 4805/8257 cut-off events. For 265324/265403 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63348 event pairs, 2006 based on Foata normal form. 10/7893 useless extension candidates. Maximal degree in co-relation 44317. Up to 7167 conditions per place. [2024-05-12 12:49:13,101 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 235 selfloop transitions, 127 changer transitions 0/376 dead transitions. [2024-05-12 12:49:13,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 376 transitions, 5850 flow [2024-05-12 12:49:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 12:49:13,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 12:49:13,102 INFO L175 Difference]: Start difference. First operand has 310 places, 354 transitions, 4700 flow. Second operand 7 states and 191 transitions. [2024-05-12 12:49:13,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 376 transitions, 5850 flow [2024-05-12 12:49:14,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 376 transitions, 5796 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:14,497 INFO L231 Difference]: Finished difference. Result has 314 places, 357 transitions, 4950 flow [2024-05-12 12:49:14,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4950, PETRI_PLACES=314, PETRI_TRANSITIONS=357} [2024-05-12 12:49:14,497 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-05-12 12:49:14,498 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 357 transitions, 4950 flow [2024-05-12 12:49:14,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:14,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:14,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:14,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 12:49:14,498 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:14,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:14,499 INFO L85 PathProgramCache]: Analyzing trace with hash -277693580, now seen corresponding path program 19 times [2024-05-12 12:49:14,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:14,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497374829] [2024-05-12 12:49:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:14,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:14,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:14,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497374829] [2024-05-12 12:49:14,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497374829] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:14,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:14,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:14,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047016675] [2024-05-12 12:49:14,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:14,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:14,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:14,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 357 transitions, 4950 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:14,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:14,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:14,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:15,916 INFO L124 PetriNetUnfolderBase]: 4802/8253 cut-off events. [2024-05-12 12:49:15,916 INFO L125 PetriNetUnfolderBase]: For 268236/268315 co-relation queries the response was YES. [2024-05-12 12:49:15,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44699 conditions, 8253 events. 4802/8253 cut-off events. For 268236/268315 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63318 event pairs, 2006 based on Foata normal form. 10/7889 useless extension candidates. Maximal degree in co-relation 44561. Up to 7164 conditions per place. [2024-05-12 12:49:16,007 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 235 selfloop transitions, 129 changer transitions 0/378 dead transitions. [2024-05-12 12:49:16,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 378 transitions, 5900 flow [2024-05-12 12:49:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 12:49:16,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 12:49:16,009 INFO L175 Difference]: Start difference. First operand has 314 places, 357 transitions, 4950 flow. Second operand 7 states and 193 transitions. [2024-05-12 12:49:16,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 378 transitions, 5900 flow [2024-05-12 12:49:17,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 378 transitions, 5576 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:17,465 INFO L231 Difference]: Finished difference. Result has 316 places, 357 transitions, 4890 flow [2024-05-12 12:49:17,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4890, PETRI_PLACES=316, PETRI_TRANSITIONS=357} [2024-05-12 12:49:17,466 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 266 predicate places. [2024-05-12 12:49:17,466 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 357 transitions, 4890 flow [2024-05-12 12:49:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:17,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:17,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 12:49:17,467 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:17,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash -924513852, now seen corresponding path program 20 times [2024-05-12 12:49:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:17,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097117160] [2024-05-12 12:49:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097117160] [2024-05-12 12:49:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097117160] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:17,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530456169] [2024-05-12 12:49:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:17,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:17,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:17,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 357 transitions, 4890 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:17,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:17,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:18,861 INFO L124 PetriNetUnfolderBase]: 4810/8267 cut-off events. [2024-05-12 12:49:18,862 INFO L125 PetriNetUnfolderBase]: For 271795/271862 co-relation queries the response was YES. [2024-05-12 12:49:18,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44792 conditions, 8267 events. 4810/8267 cut-off events. For 271795/271862 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63484 event pairs, 1980 based on Foata normal form. 1/7888 useless extension candidates. Maximal degree in co-relation 44653. Up to 7173 conditions per place. [2024-05-12 12:49:18,959 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 237 selfloop transitions, 138 changer transitions 0/389 dead transitions. [2024-05-12 12:49:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 389 transitions, 5940 flow [2024-05-12 12:49:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:49:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:49:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-05-12 12:49:18,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:49:18,961 INFO L175 Difference]: Start difference. First operand has 316 places, 357 transitions, 4890 flow. Second operand 9 states and 243 transitions. [2024-05-12 12:49:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 389 transitions, 5940 flow [2024-05-12 12:49:20,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 389 transitions, 5630 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:20,223 INFO L231 Difference]: Finished difference. Result has 318 places, 360 transitions, 4922 flow [2024-05-12 12:49:20,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4922, PETRI_PLACES=318, PETRI_TRANSITIONS=360} [2024-05-12 12:49:20,223 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-05-12 12:49:20,223 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 360 transitions, 4922 flow [2024-05-12 12:49:20,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:20,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:20,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 12:49:20,224 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:20,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1547690618, now seen corresponding path program 21 times [2024-05-12 12:49:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:20,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330558707] [2024-05-12 12:49:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:20,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330558707] [2024-05-12 12:49:20,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330558707] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:20,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:20,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857389973] [2024-05-12 12:49:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:20,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:20,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:20,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 360 transitions, 4922 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:20,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:20,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:21,619 INFO L124 PetriNetUnfolderBase]: 4807/8263 cut-off events. [2024-05-12 12:49:21,619 INFO L125 PetriNetUnfolderBase]: For 272642/272709 co-relation queries the response was YES. [2024-05-12 12:49:21,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44743 conditions, 8263 events. 4807/8263 cut-off events. For 272642/272709 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 63354 event pairs, 1980 based on Foata normal form. 1/7884 useless extension candidates. Maximal degree in co-relation 44603. Up to 7170 conditions per place. [2024-05-12 12:49:21,715 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 237 selfloop transitions, 140 changer transitions 0/391 dead transitions. [2024-05-12 12:49:21,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 391 transitions, 5754 flow [2024-05-12 12:49:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:49:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:49:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 12:49:21,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 12:49:21,716 INFO L175 Difference]: Start difference. First operand has 318 places, 360 transitions, 4922 flow. Second operand 9 states and 246 transitions. [2024-05-12 12:49:21,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 391 transitions, 5754 flow [2024-05-12 12:49:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 391 transitions, 5348 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-05-12 12:49:23,541 INFO L231 Difference]: Finished difference. Result has 318 places, 360 transitions, 4806 flow [2024-05-12 12:49:23,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4806, PETRI_PLACES=318, PETRI_TRANSITIONS=360} [2024-05-12 12:49:23,541 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-05-12 12:49:23,541 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 360 transitions, 4806 flow [2024-05-12 12:49:23,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:23,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:23,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:23,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 12:49:23,542 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:23,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:23,542 INFO L85 PathProgramCache]: Analyzing trace with hash -928335408, now seen corresponding path program 4 times [2024-05-12 12:49:23,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:23,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124682852] [2024-05-12 12:49:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:23,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:23,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:23,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124682852] [2024-05-12 12:49:23,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124682852] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:23,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:23,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:23,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125713687] [2024-05-12 12:49:23,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:23,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:23,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:23,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:23,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 360 transitions, 4806 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:24,977 INFO L124 PetriNetUnfolderBase]: 4794/8325 cut-off events. [2024-05-12 12:49:24,977 INFO L125 PetriNetUnfolderBase]: For 267526/267585 co-relation queries the response was YES. [2024-05-12 12:49:25,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44110 conditions, 8325 events. 4794/8325 cut-off events. For 267526/267585 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 63755 event pairs, 1685 based on Foata normal form. 6/7959 useless extension candidates. Maximal degree in co-relation 43970. Up to 6634 conditions per place. [2024-05-12 12:49:25,077 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 324 selfloop transitions, 59 changer transitions 0/397 dead transitions. [2024-05-12 12:49:25,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 397 transitions, 5698 flow [2024-05-12 12:49:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:49:25,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 12:49:25,078 INFO L175 Difference]: Start difference. First operand has 318 places, 360 transitions, 4806 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:49:25,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 397 transitions, 5698 flow [2024-05-12 12:49:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 397 transitions, 5344 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 12:49:26,964 INFO L231 Difference]: Finished difference. Result has 315 places, 360 transitions, 4580 flow [2024-05-12 12:49:26,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4580, PETRI_PLACES=315, PETRI_TRANSITIONS=360} [2024-05-12 12:49:26,965 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 265 predicate places. [2024-05-12 12:49:26,965 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 360 transitions, 4580 flow [2024-05-12 12:49:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:26,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:26,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:26,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 12:49:26,966 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:26,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash 361473680, now seen corresponding path program 7 times [2024-05-12 12:49:26,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:26,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244397098] [2024-05-12 12:49:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:26,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:27,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244397098] [2024-05-12 12:49:27,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244397098] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:27,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:27,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968811709] [2024-05-12 12:49:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:27,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:27,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:27,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 360 transitions, 4580 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:27,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:27,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:27,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:28,426 INFO L124 PetriNetUnfolderBase]: 4939/8505 cut-off events. [2024-05-12 12:49:28,426 INFO L125 PetriNetUnfolderBase]: For 302504/302571 co-relation queries the response was YES. [2024-05-12 12:49:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46229 conditions, 8505 events. 4939/8505 cut-off events. For 302504/302571 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 65701 event pairs, 2003 based on Foata normal form. 6/8129 useless extension candidates. Maximal degree in co-relation 46089. Up to 7174 conditions per place. [2024-05-12 12:49:28,528 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 294 selfloop transitions, 90 changer transitions 0/398 dead transitions. [2024-05-12 12:49:28,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 398 transitions, 5692 flow [2024-05-12 12:49:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 12:49:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 12:49:28,530 INFO L175 Difference]: Start difference. First operand has 315 places, 360 transitions, 4580 flow. Second operand 8 states and 221 transitions. [2024-05-12 12:49:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 398 transitions, 5692 flow [2024-05-12 12:49:30,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 398 transitions, 5571 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:30,163 INFO L231 Difference]: Finished difference. Result has 317 places, 362 transitions, 4693 flow [2024-05-12 12:49:30,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4693, PETRI_PLACES=317, PETRI_TRANSITIONS=362} [2024-05-12 12:49:30,164 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-05-12 12:49:30,164 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 362 transitions, 4693 flow [2024-05-12 12:49:30,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:30,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:30,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:30,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 12:49:30,164 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:30,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 363351350, now seen corresponding path program 8 times [2024-05-12 12:49:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:30,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928076977] [2024-05-12 12:49:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928076977] [2024-05-12 12:49:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928076977] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:30,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108579979] [2024-05-12 12:49:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:30,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:30,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:30,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:30,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 362 transitions, 4693 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:30,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:30,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:30,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:31,680 INFO L124 PetriNetUnfolderBase]: 5013/8615 cut-off events. [2024-05-12 12:49:31,680 INFO L125 PetriNetUnfolderBase]: For 296599/296670 co-relation queries the response was YES. [2024-05-12 12:49:31,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46628 conditions, 8615 events. 5013/8615 cut-off events. For 296599/296670 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 66557 event pairs, 2071 based on Foata normal form. 8/8231 useless extension candidates. Maximal degree in co-relation 46489. Up to 7512 conditions per place. [2024-05-12 12:49:31,767 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 289 selfloop transitions, 84 changer transitions 0/387 dead transitions. [2024-05-12 12:49:31,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 387 transitions, 5547 flow [2024-05-12 12:49:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 12:49:31,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-05-12 12:49:31,769 INFO L175 Difference]: Start difference. First operand has 317 places, 362 transitions, 4693 flow. Second operand 8 states and 210 transitions. [2024-05-12 12:49:31,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 387 transitions, 5547 flow [2024-05-12 12:49:33,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 387 transitions, 5425 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:33,392 INFO L231 Difference]: Finished difference. Result has 321 places, 363 transitions, 4768 flow [2024-05-12 12:49:33,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4768, PETRI_PLACES=321, PETRI_TRANSITIONS=363} [2024-05-12 12:49:33,393 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-05-12 12:49:33,393 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 363 transitions, 4768 flow [2024-05-12 12:49:33,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:33,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:33,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:33,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 12:49:33,393 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:33,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1233814798, now seen corresponding path program 9 times [2024-05-12 12:49:33,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:33,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586489040] [2024-05-12 12:49:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:33,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:33,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:33,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586489040] [2024-05-12 12:49:33,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586489040] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:33,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:33,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:33,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214188134] [2024-05-12 12:49:33,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:33,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:33,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:33,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:33,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:33,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 363 transitions, 4768 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:33,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:33,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:33,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:34,899 INFO L124 PetriNetUnfolderBase]: 5066/8715 cut-off events. [2024-05-12 12:49:34,900 INFO L125 PetriNetUnfolderBase]: For 293915/293989 co-relation queries the response was YES. [2024-05-12 12:49:34,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47104 conditions, 8715 events. 5066/8715 cut-off events. For 293915/293989 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 67491 event pairs, 2072 based on Foata normal form. 6/8327 useless extension candidates. Maximal degree in co-relation 46963. Up to 7518 conditions per place. [2024-05-12 12:49:34,999 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 293 selfloop transitions, 86 changer transitions 0/393 dead transitions. [2024-05-12 12:49:34,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 393 transitions, 5656 flow [2024-05-12 12:49:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 12:49:35,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 12:49:35,000 INFO L175 Difference]: Start difference. First operand has 321 places, 363 transitions, 4768 flow. Second operand 8 states and 215 transitions. [2024-05-12 12:49:35,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 393 transitions, 5656 flow [2024-05-12 12:49:36,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 393 transitions, 5483 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:36,264 INFO L231 Difference]: Finished difference. Result has 323 places, 364 transitions, 4793 flow [2024-05-12 12:49:36,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4793, PETRI_PLACES=323, PETRI_TRANSITIONS=364} [2024-05-12 12:49:36,265 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-05-12 12:49:36,265 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 364 transitions, 4793 flow [2024-05-12 12:49:36,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:36,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:36,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:36,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 12:49:36,265 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:36,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:36,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1275037588, now seen corresponding path program 10 times [2024-05-12 12:49:36,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:36,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020409442] [2024-05-12 12:49:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:36,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:36,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020409442] [2024-05-12 12:49:36,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020409442] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:36,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:36,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:36,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629832720] [2024-05-12 12:49:36,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:36,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:36,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:36,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:36,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 364 transitions, 4793 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:36,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:36,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:36,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:37,814 INFO L124 PetriNetUnfolderBase]: 5185/8959 cut-off events. [2024-05-12 12:49:37,814 INFO L125 PetriNetUnfolderBase]: For 323658/323719 co-relation queries the response was YES. [2024-05-12 12:49:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48909 conditions, 8959 events. 5185/8959 cut-off events. For 323658/323719 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 70047 event pairs, 1952 based on Foata normal form. 6/8581 useless extension candidates. Maximal degree in co-relation 48767. Up to 6058 conditions per place. [2024-05-12 12:49:37,915 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 282 selfloop transitions, 113 changer transitions 0/409 dead transitions. [2024-05-12 12:49:37,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 409 transitions, 6145 flow [2024-05-12 12:49:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-05-12 12:49:37,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-05-12 12:49:37,917 INFO L175 Difference]: Start difference. First operand has 323 places, 364 transitions, 4793 flow. Second operand 8 states and 227 transitions. [2024-05-12 12:49:37,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 409 transitions, 6145 flow [2024-05-12 12:49:39,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 409 transitions, 5961 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:39,747 INFO L231 Difference]: Finished difference. Result has 325 places, 366 transitions, 4885 flow [2024-05-12 12:49:39,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4609, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=325, PETRI_TRANSITIONS=366} [2024-05-12 12:49:39,748 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 275 predicate places. [2024-05-12 12:49:39,748 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 366 transitions, 4885 flow [2024-05-12 12:49:39,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:39,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:39,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:39,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 12:49:39,750 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:39,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1629300628, now seen corresponding path program 11 times [2024-05-12 12:49:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:39,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428648436] [2024-05-12 12:49:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:39,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428648436] [2024-05-12 12:49:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428648436] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:39,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176486491] [2024-05-12 12:49:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:39,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:39,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 366 transitions, 4885 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:39,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:39,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:39,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:41,383 INFO L124 PetriNetUnfolderBase]: 5304/9151 cut-off events. [2024-05-12 12:49:41,384 INFO L125 PetriNetUnfolderBase]: For 359220/359281 co-relation queries the response was YES. [2024-05-12 12:49:41,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51352 conditions, 9151 events. 5304/9151 cut-off events. For 359220/359281 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 71993 event pairs, 1918 based on Foata normal form. 6/8773 useless extension candidates. Maximal degree in co-relation 51209. Up to 6124 conditions per place. [2024-05-12 12:49:41,685 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 282 selfloop transitions, 113 changer transitions 0/409 dead transitions. [2024-05-12 12:49:41,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 409 transitions, 6233 flow [2024-05-12 12:49:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 12:49:41,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-05-12 12:49:41,686 INFO L175 Difference]: Start difference. First operand has 325 places, 366 transitions, 4885 flow. Second operand 8 states and 225 transitions. [2024-05-12 12:49:41,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 409 transitions, 6233 flow [2024-05-12 12:49:43,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 409 transitions, 5980 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:43,774 INFO L231 Difference]: Finished difference. Result has 328 places, 368 transitions, 4910 flow [2024-05-12 12:49:43,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4910, PETRI_PLACES=328, PETRI_TRANSITIONS=368} [2024-05-12 12:49:43,775 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 278 predicate places. [2024-05-12 12:49:43,775 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 368 transitions, 4910 flow [2024-05-12 12:49:43,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:43,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:43,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:43,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 12:49:43,775 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:43,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:43,776 INFO L85 PathProgramCache]: Analyzing trace with hash 964313808, now seen corresponding path program 12 times [2024-05-12 12:49:43,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:43,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967398741] [2024-05-12 12:49:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:43,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:43,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967398741] [2024-05-12 12:49:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967398741] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218451507] [2024-05-12 12:49:43,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:43,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 368 transitions, 4910 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:45,399 INFO L124 PetriNetUnfolderBase]: 5291/9133 cut-off events. [2024-05-12 12:49:45,399 INFO L125 PetriNetUnfolderBase]: For 337581/337654 co-relation queries the response was YES. [2024-05-12 12:49:45,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50663 conditions, 9133 events. 5291/9133 cut-off events. For 337581/337654 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 71796 event pairs, 1959 based on Foata normal form. 6/8755 useless extension candidates. Maximal degree in co-relation 50519. Up to 7724 conditions per place. [2024-05-12 12:49:45,504 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 361 selfloop transitions, 30 changer transitions 0/405 dead transitions. [2024-05-12 12:49:45,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 405 transitions, 5836 flow [2024-05-12 12:49:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 12:49:45,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:49:45,506 INFO L175 Difference]: Start difference. First operand has 328 places, 368 transitions, 4910 flow. Second operand 8 states and 216 transitions. [2024-05-12 12:49:45,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 405 transitions, 5836 flow [2024-05-12 12:49:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 405 transitions, 5657 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:47,612 INFO L231 Difference]: Finished difference. Result has 332 places, 368 transitions, 4795 flow [2024-05-12 12:49:47,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4731, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4795, PETRI_PLACES=332, PETRI_TRANSITIONS=368} [2024-05-12 12:49:47,612 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 282 predicate places. [2024-05-12 12:49:47,612 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 368 transitions, 4795 flow [2024-05-12 12:49:47,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:47,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:47,613 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] [2024-05-12 12:49:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 12:49:47,613 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:47,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:47,613 INFO L85 PathProgramCache]: Analyzing trace with hash 176259628, now seen corresponding path program 13 times [2024-05-12 12:49:47,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002953387] [2024-05-12 12:49:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:47,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:47,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002953387] [2024-05-12 12:49:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002953387] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:47,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:47,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:47,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097586890] [2024-05-12 12:49:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:47,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:47,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:47,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 368 transitions, 4795 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:47,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:47,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:47,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:49,235 INFO L124 PetriNetUnfolderBase]: 5397/9345 cut-off events. [2024-05-12 12:49:49,236 INFO L125 PetriNetUnfolderBase]: For 343816/343889 co-relation queries the response was YES. [2024-05-12 12:49:49,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50797 conditions, 9345 events. 5397/9345 cut-off events. For 343816/343889 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 74013 event pairs, 2200 based on Foata normal form. 6/8955 useless extension candidates. Maximal degree in co-relation 50652. Up to 8051 conditions per place. [2024-05-12 12:49:49,346 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 361 selfloop transitions, 26 changer transitions 0/401 dead transitions. [2024-05-12 12:49:49,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 401 transitions, 5729 flow [2024-05-12 12:49:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 12:49:49,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733695652173914 [2024-05-12 12:49:49,347 INFO L175 Difference]: Start difference. First operand has 332 places, 368 transitions, 4795 flow. Second operand 8 states and 211 transitions. [2024-05-12 12:49:49,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 401 transitions, 5729 flow [2024-05-12 12:49:51,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 401 transitions, 5646 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:51,625 INFO L231 Difference]: Finished difference. Result has 333 places, 370 transitions, 4804 flow [2024-05-12 12:49:51,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4804, PETRI_PLACES=333, PETRI_TRANSITIONS=370} [2024-05-12 12:49:51,626 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 283 predicate places. [2024-05-12 12:49:51,626 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 370 transitions, 4804 flow [2024-05-12 12:49:51,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:51,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:51,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:51,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 12:49:51,627 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:51,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:51,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1884701306, now seen corresponding path program 14 times [2024-05-12 12:49:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593132807] [2024-05-12 12:49:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:51,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593132807] [2024-05-12 12:49:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593132807] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:51,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:51,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:51,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203502950] [2024-05-12 12:49:51,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:51,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:51,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:51,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:51,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 370 transitions, 4804 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:51,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:51,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:51,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:53,498 INFO L124 PetriNetUnfolderBase]: 5542/9575 cut-off events. [2024-05-12 12:49:53,498 INFO L125 PetriNetUnfolderBase]: For 388811/388888 co-relation queries the response was YES. [2024-05-12 12:49:53,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52898 conditions, 9575 events. 5542/9575 cut-off events. For 388811/388888 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 76076 event pairs, 2344 based on Foata normal form. 6/9171 useless extension candidates. Maximal degree in co-relation 52752. Up to 8234 conditions per place. [2024-05-12 12:49:53,592 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 300 selfloop transitions, 85 changer transitions 0/399 dead transitions. [2024-05-12 12:49:53,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 399 transitions, 5904 flow [2024-05-12 12:49:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:49:53,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:49:53,593 INFO L175 Difference]: Start difference. First operand has 333 places, 370 transitions, 4804 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:49:53,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 399 transitions, 5904 flow [2024-05-12 12:49:55,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 399 transitions, 5836 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:55,922 INFO L231 Difference]: Finished difference. Result has 336 places, 372 transitions, 4958 flow [2024-05-12 12:49:55,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4958, PETRI_PLACES=336, PETRI_TRANSITIONS=372} [2024-05-12 12:49:55,922 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 286 predicate places. [2024-05-12 12:49:55,922 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 372 transitions, 4958 flow [2024-05-12 12:49:55,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:55,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:55,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:55,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 12:49:55,923 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:55,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1571268496, now seen corresponding path program 15 times [2024-05-12 12:49:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:55,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227865921] [2024-05-12 12:49:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:55,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227865921] [2024-05-12 12:49:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227865921] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:56,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:56,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636417069] [2024-05-12 12:49:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:56,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:49:56,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 372 transitions, 4958 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:56,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:56,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:49:56,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:57,628 INFO L124 PetriNetUnfolderBase]: 5687/9851 cut-off events. [2024-05-12 12:49:57,629 INFO L125 PetriNetUnfolderBase]: For 430067/430135 co-relation queries the response was YES. [2024-05-12 12:49:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55135 conditions, 9851 events. 5687/9851 cut-off events. For 430067/430135 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 78906 event pairs, 2321 based on Foata normal form. 6/9452 useless extension candidates. Maximal degree in co-relation 54988. Up to 7687 conditions per place. [2024-05-12 12:49:57,747 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 298 selfloop transitions, 96 changer transitions 0/408 dead transitions. [2024-05-12 12:49:57,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 408 transitions, 6300 flow [2024-05-12 12:49:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 12:49:57,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 12:49:57,748 INFO L175 Difference]: Start difference. First operand has 336 places, 372 transitions, 4958 flow. Second operand 8 states and 219 transitions. [2024-05-12 12:49:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 408 transitions, 6300 flow [2024-05-12 12:50:00,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 408 transitions, 6189 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:00,516 INFO L231 Difference]: Finished difference. Result has 340 places, 374 transitions, 5087 flow [2024-05-12 12:50:00,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5087, PETRI_PLACES=340, PETRI_TRANSITIONS=374} [2024-05-12 12:50:00,516 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 290 predicate places. [2024-05-12 12:50:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 374 transitions, 5087 flow [2024-05-12 12:50:00,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:00,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:00,517 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] [2024-05-12 12:50:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 12:50:00,517 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:00,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 318766318, now seen corresponding path program 16 times [2024-05-12 12:50:00,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:00,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684934478] [2024-05-12 12:50:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684934478] [2024-05-12 12:50:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684934478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:00,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947403470] [2024-05-12 12:50:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:00,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:00,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:00,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 374 transitions, 5087 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:00,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:00,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:00,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:02,418 INFO L124 PetriNetUnfolderBase]: 5761/9981 cut-off events. [2024-05-12 12:50:02,418 INFO L125 PetriNetUnfolderBase]: For 451149/451226 co-relation queries the response was YES. [2024-05-12 12:50:02,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56587 conditions, 9981 events. 5761/9981 cut-off events. For 451149/451226 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 80245 event pairs, 2422 based on Foata normal form. 8/9571 useless extension candidates. Maximal degree in co-relation 56438. Up to 8556 conditions per place. [2024-05-12 12:50:02,545 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 362 selfloop transitions, 28 changer transitions 0/404 dead transitions. [2024-05-12 12:50:02,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 404 transitions, 6202 flow [2024-05-12 12:50:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:50:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:50:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-05-12 12:50:02,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-05-12 12:50:02,547 INFO L175 Difference]: Start difference. First operand has 340 places, 374 transitions, 5087 flow. Second operand 9 states and 230 transitions. [2024-05-12 12:50:02,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 404 transitions, 6202 flow [2024-05-12 12:50:05,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 404 transitions, 6064 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:05,178 INFO L231 Difference]: Finished difference. Result has 346 places, 375 transitions, 5044 flow [2024-05-12 12:50:05,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5044, PETRI_PLACES=346, PETRI_TRANSITIONS=375} [2024-05-12 12:50:05,179 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-05-12 12:50:05,179 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 375 transitions, 5044 flow [2024-05-12 12:50:05,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:05,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:05,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:05,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 12:50:05,179 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:05,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash 975597968, now seen corresponding path program 17 times [2024-05-12 12:50:05,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:05,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339645662] [2024-05-12 12:50:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339645662] [2024-05-12 12:50:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339645662] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682717319] [2024-05-12 12:50:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:05,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:05,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:05,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 375 transitions, 5044 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:05,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:05,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:05,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:07,161 INFO L124 PetriNetUnfolderBase]: 5743/9955 cut-off events. [2024-05-12 12:50:07,162 INFO L125 PetriNetUnfolderBase]: For 421904/421988 co-relation queries the response was YES. [2024-05-12 12:50:07,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55711 conditions, 9955 events. 5743/9955 cut-off events. For 421904/421988 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 80048 event pairs, 2470 based on Foata normal form. 8/9539 useless extension candidates. Maximal degree in co-relation 55559. Up to 8742 conditions per place. [2024-05-12 12:50:07,260 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 356 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-05-12 12:50:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 396 transitions, 5886 flow [2024-05-12 12:50:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 12:50:07,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516304347826086 [2024-05-12 12:50:07,262 INFO L175 Difference]: Start difference. First operand has 346 places, 375 transitions, 5044 flow. Second operand 8 states and 203 transitions. [2024-05-12 12:50:07,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 396 transitions, 5886 flow [2024-05-12 12:50:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 396 transitions, 5813 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:09,774 INFO L231 Difference]: Finished difference. Result has 347 places, 375 transitions, 5028 flow [2024-05-12 12:50:09,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5028, PETRI_PLACES=347, PETRI_TRANSITIONS=375} [2024-05-12 12:50:09,775 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 297 predicate places. [2024-05-12 12:50:09,775 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 375 transitions, 5028 flow [2024-05-12 12:50:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:09,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:09,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:09,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 12:50:09,776 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:09,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash 167054488, now seen corresponding path program 18 times [2024-05-12 12:50:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:09,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321295208] [2024-05-12 12:50:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:09,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:09,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321295208] [2024-05-12 12:50:09,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321295208] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:09,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:09,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:09,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918089003] [2024-05-12 12:50:09,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:09,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:09,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:09,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 375 transitions, 5028 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:09,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:09,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:11,526 INFO L124 PetriNetUnfolderBase]: 5725/9928 cut-off events. [2024-05-12 12:50:11,527 INFO L125 PetriNetUnfolderBase]: For 391291/391372 co-relation queries the response was YES. [2024-05-12 12:50:11,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 9928 events. 5725/9928 cut-off events. For 391291/391372 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 79858 event pairs, 2474 based on Foata normal form. 8/9512 useless extension candidates. Maximal degree in co-relation 54270. Up to 8620 conditions per place. [2024-05-12 12:50:11,650 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 299 selfloop transitions, 83 changer transitions 0/396 dead transitions. [2024-05-12 12:50:11,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 396 transitions, 5870 flow [2024-05-12 12:50:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 12:50:11,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 12:50:11,651 INFO L175 Difference]: Start difference. First operand has 347 places, 375 transitions, 5028 flow. Second operand 8 states and 208 transitions. [2024-05-12 12:50:11,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 396 transitions, 5870 flow [2024-05-12 12:50:14,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 396 transitions, 5811 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:14,357 INFO L231 Difference]: Finished difference. Result has 349 places, 375 transitions, 5140 flow [2024-05-12 12:50:14,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5140, PETRI_PLACES=349, PETRI_TRANSITIONS=375} [2024-05-12 12:50:14,358 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 299 predicate places. [2024-05-12 12:50:14,358 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 375 transitions, 5140 flow [2024-05-12 12:50:14,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:14,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:14,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 12:50:14,359 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:14,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1099821014, now seen corresponding path program 19 times [2024-05-12 12:50:14,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:14,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151244297] [2024-05-12 12:50:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:14,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:14,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:14,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151244297] [2024-05-12 12:50:14,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151244297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:14,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:14,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:14,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109159071] [2024-05-12 12:50:14,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:14,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:14,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:14,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:14,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:14,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 375 transitions, 5140 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:14,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:14,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:16,186 INFO L124 PetriNetUnfolderBase]: 5799/10075 cut-off events. [2024-05-12 12:50:16,186 INFO L125 PetriNetUnfolderBase]: For 399434/399518 co-relation queries the response was YES. [2024-05-12 12:50:16,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55338 conditions, 10075 events. 5799/10075 cut-off events. For 399434/399518 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 81329 event pairs, 2467 based on Foata normal form. 8/9655 useless extension candidates. Maximal degree in co-relation 55184. Up to 8748 conditions per place. [2024-05-12 12:50:16,313 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 350 selfloop transitions, 48 changer transitions 0/412 dead transitions. [2024-05-12 12:50:16,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 412 transitions, 6079 flow [2024-05-12 12:50:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:50:16,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 12:50:16,314 INFO L175 Difference]: Start difference. First operand has 349 places, 375 transitions, 5140 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:50:16,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 412 transitions, 6079 flow [2024-05-12 12:50:19,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 412 transitions, 5897 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 12:50:19,536 INFO L231 Difference]: Finished difference. Result has 349 places, 376 transitions, 5092 flow [2024-05-12 12:50:19,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5092, PETRI_PLACES=349, PETRI_TRANSITIONS=376} [2024-05-12 12:50:19,537 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 299 predicate places. [2024-05-12 12:50:19,537 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 376 transitions, 5092 flow [2024-05-12 12:50:19,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:19,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:19,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:19,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 12:50:19,537 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:19,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:19,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1083856938, now seen corresponding path program 20 times [2024-05-12 12:50:19,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:19,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862988616] [2024-05-12 12:50:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:19,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862988616] [2024-05-12 12:50:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862988616] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:19,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:19,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86356295] [2024-05-12 12:50:19,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:19,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:19,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 376 transitions, 5092 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:19,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:19,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:19,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:21,375 INFO L124 PetriNetUnfolderBase]: 5873/10199 cut-off events. [2024-05-12 12:50:21,376 INFO L125 PetriNetUnfolderBase]: For 409223/409313 co-relation queries the response was YES. [2024-05-12 12:50:21,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56223 conditions, 10199 events. 5873/10199 cut-off events. For 409223/409313 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 82621 event pairs, 2489 based on Foata normal form. 8/9772 useless extension candidates. Maximal degree in co-relation 56069. Up to 8862 conditions per place. [2024-05-12 12:50:21,516 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 347 selfloop transitions, 48 changer transitions 0/409 dead transitions. [2024-05-12 12:50:21,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 409 transitions, 6018 flow [2024-05-12 12:50:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:50:21,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 12:50:21,517 INFO L175 Difference]: Start difference. First operand has 349 places, 376 transitions, 5092 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:50:21,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 409 transitions, 6018 flow [2024-05-12 12:50:25,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 409 transitions, 5913 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:25,376 INFO L231 Difference]: Finished difference. Result has 349 places, 377 transitions, 5124 flow [2024-05-12 12:50:25,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5124, PETRI_PLACES=349, PETRI_TRANSITIONS=377} [2024-05-12 12:50:25,377 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 299 predicate places. [2024-05-12 12:50:25,377 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 377 transitions, 5124 flow [2024-05-12 12:50:25,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:25,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:25,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 12:50:25,378 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:25,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1091250134, now seen corresponding path program 21 times [2024-05-12 12:50:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338273483] [2024-05-12 12:50:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:25,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:25,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338273483] [2024-05-12 12:50:25,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338273483] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:25,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:25,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37898830] [2024-05-12 12:50:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:25,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:25,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 377 transitions, 5124 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:25,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:25,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:25,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:27,239 INFO L124 PetriNetUnfolderBase]: 5974/10430 cut-off events. [2024-05-12 12:50:27,239 INFO L125 PetriNetUnfolderBase]: For 401044/401127 co-relation queries the response was YES. [2024-05-12 12:50:27,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56892 conditions, 10430 events. 5974/10430 cut-off events. For 401044/401127 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 85073 event pairs, 2098 based on Foata normal form. 8/10024 useless extension candidates. Maximal degree in co-relation 56738. Up to 8610 conditions per place. [2024-05-12 12:50:27,373 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 344 selfloop transitions, 63 changer transitions 0/421 dead transitions. [2024-05-12 12:50:27,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 421 transitions, 6134 flow [2024-05-12 12:50:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-05-12 12:50:27,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-05-12 12:50:27,375 INFO L175 Difference]: Start difference. First operand has 349 places, 377 transitions, 5124 flow. Second operand 8 states and 231 transitions. [2024-05-12 12:50:27,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 421 transitions, 6134 flow [2024-05-12 12:50:31,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 421 transitions, 6031 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:31,076 INFO L231 Difference]: Finished difference. Result has 353 places, 379 transitions, 5224 flow [2024-05-12 12:50:31,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5224, PETRI_PLACES=353, PETRI_TRANSITIONS=379} [2024-05-12 12:50:31,076 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-05-12 12:50:31,076 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 379 transitions, 5224 flow [2024-05-12 12:50:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:31,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:31,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 12:50:31,077 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:31,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash 501546166, now seen corresponding path program 22 times [2024-05-12 12:50:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:31,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16128383] [2024-05-12 12:50:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:31,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:31,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:31,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16128383] [2024-05-12 12:50:31,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16128383] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:31,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:31,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485376946] [2024-05-12 12:50:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:31,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:31,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:31,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:31,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 379 transitions, 5224 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:31,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:31,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:32,959 INFO L124 PetriNetUnfolderBase]: 6022/10460 cut-off events. [2024-05-12 12:50:32,959 INFO L125 PetriNetUnfolderBase]: For 404299/404398 co-relation queries the response was YES. [2024-05-12 12:50:33,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57677 conditions, 10460 events. 6022/10460 cut-off events. For 404299/404398 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 85301 event pairs, 2631 based on Foata normal form. 17/10037 useless extension candidates. Maximal degree in co-relation 57521. Up to 9036 conditions per place. [2024-05-12 12:50:33,094 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 290 selfloop transitions, 99 changer transitions 0/403 dead transitions. [2024-05-12 12:50:33,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 403 transitions, 6113 flow [2024-05-12 12:50:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 12:50:33,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 12:50:33,096 INFO L175 Difference]: Start difference. First operand has 353 places, 379 transitions, 5224 flow. Second operand 7 states and 191 transitions. [2024-05-12 12:50:33,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 403 transitions, 6113 flow [2024-05-12 12:50:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 403 transitions, 6006 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:35,996 INFO L231 Difference]: Finished difference. Result has 354 places, 380 transitions, 5349 flow [2024-05-12 12:50:35,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5117, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5349, PETRI_PLACES=354, PETRI_TRANSITIONS=380} [2024-05-12 12:50:35,996 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 304 predicate places. [2024-05-12 12:50:35,996 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 380 transitions, 5349 flow [2024-05-12 12:50:35,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:35,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:35,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 12:50:35,997 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:35,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash -277478316, now seen corresponding path program 23 times [2024-05-12 12:50:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986098991] [2024-05-12 12:50:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:36,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986098991] [2024-05-12 12:50:36,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986098991] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:36,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:36,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248812580] [2024-05-12 12:50:36,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:36,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:36,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 380 transitions, 5349 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:36,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:36,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:36,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:37,900 INFO L124 PetriNetUnfolderBase]: 6009/10463 cut-off events. [2024-05-12 12:50:37,900 INFO L125 PetriNetUnfolderBase]: For 366410/366506 co-relation queries the response was YES. [2024-05-12 12:50:38,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56827 conditions, 10463 events. 6009/10463 cut-off events. For 366410/366506 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 85455 event pairs, 2580 based on Foata normal form. 15/10043 useless extension candidates. Maximal degree in co-relation 56671. Up to 8834 conditions per place. [2024-05-12 12:50:38,046 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 293 selfloop transitions, 104 changer transitions 0/411 dead transitions. [2024-05-12 12:50:38,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 411 transitions, 6259 flow [2024-05-12 12:50:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 12:50:38,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 12:50:38,047 INFO L175 Difference]: Start difference. First operand has 354 places, 380 transitions, 5349 flow. Second operand 7 states and 199 transitions. [2024-05-12 12:50:38,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 411 transitions, 6259 flow [2024-05-12 12:50:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 411 transitions, 6044 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:40,741 INFO L231 Difference]: Finished difference. Result has 356 places, 380 transitions, 5346 flow [2024-05-12 12:50:40,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5134, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5346, PETRI_PLACES=356, PETRI_TRANSITIONS=380} [2024-05-12 12:50:40,742 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 306 predicate places. [2024-05-12 12:50:40,742 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 380 transitions, 5346 flow [2024-05-12 12:50:40,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:40,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:40,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:40,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 12:50:40,742 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:40,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:40,743 INFO L85 PathProgramCache]: Analyzing trace with hash 511154926, now seen corresponding path program 24 times [2024-05-12 12:50:40,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:40,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802164739] [2024-05-12 12:50:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802164739] [2024-05-12 12:50:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802164739] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:40,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135428555] [2024-05-12 12:50:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:40,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:40,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:40,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 380 transitions, 5346 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:40,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:40,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:40,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:42,668 INFO L124 PetriNetUnfolderBase]: 6062/10519 cut-off events. [2024-05-12 12:50:42,668 INFO L125 PetriNetUnfolderBase]: For 370233/370319 co-relation queries the response was YES. [2024-05-12 12:50:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57179 conditions, 10519 events. 6062/10519 cut-off events. For 370233/370319 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 85580 event pairs, 2278 based on Foata normal form. 6/10099 useless extension candidates. Maximal degree in co-relation 57022. Up to 9066 conditions per place. [2024-05-12 12:50:42,812 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 377 selfloop transitions, 23 changer transitions 0/414 dead transitions. [2024-05-12 12:50:42,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 414 transitions, 6303 flow [2024-05-12 12:50:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 12:50:42,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 12:50:42,814 INFO L175 Difference]: Start difference. First operand has 356 places, 380 transitions, 5346 flow. Second operand 7 states and 193 transitions. [2024-05-12 12:50:42,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 414 transitions, 6303 flow [2024-05-12 12:50:46,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 414 transitions, 5986 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:46,380 INFO L231 Difference]: Finished difference. Result has 356 places, 381 transitions, 5106 flow [2024-05-12 12:50:46,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5029, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5106, PETRI_PLACES=356, PETRI_TRANSITIONS=381} [2024-05-12 12:50:46,380 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 306 predicate places. [2024-05-12 12:50:46,381 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 381 transitions, 5106 flow [2024-05-12 12:50:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:46,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:46,381 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] [2024-05-12 12:50:46,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 12:50:46,381 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:46,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:46,382 INFO L85 PathProgramCache]: Analyzing trace with hash -11781036, now seen corresponding path program 25 times [2024-05-12 12:50:46,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:46,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602943826] [2024-05-12 12:50:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:46,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:46,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:46,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602943826] [2024-05-12 12:50:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602943826] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:46,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390779594] [2024-05-12 12:50:46,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:46,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:46,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:46,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 381 transitions, 5106 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:46,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:46,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:46,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:48,351 INFO L124 PetriNetUnfolderBase]: 6303/11128 cut-off events. [2024-05-12 12:50:48,351 INFO L125 PetriNetUnfolderBase]: For 475046/475158 co-relation queries the response was YES. [2024-05-12 12:50:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60265 conditions, 11128 events. 6303/11128 cut-off events. For 475046/475158 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 92925 event pairs, 2427 based on Foata normal form. 15/10703 useless extension candidates. Maximal degree in co-relation 60108. Up to 6534 conditions per place. [2024-05-12 12:50:48,483 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 285 selfloop transitions, 122 changer transitions 0/421 dead transitions. [2024-05-12 12:50:48,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 421 transitions, 6292 flow [2024-05-12 12:50:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-05-12 12:50:48,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 12:50:48,484 INFO L175 Difference]: Start difference. First operand has 356 places, 381 transitions, 5106 flow. Second operand 7 states and 207 transitions. [2024-05-12 12:50:48,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 421 transitions, 6292 flow [2024-05-12 12:50:51,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 421 transitions, 6086 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-05-12 12:50:51,960 INFO L231 Difference]: Finished difference. Result has 355 places, 381 transitions, 5148 flow [2024-05-12 12:50:51,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5148, PETRI_PLACES=355, PETRI_TRANSITIONS=381} [2024-05-12 12:50:51,960 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 305 predicate places. [2024-05-12 12:50:51,961 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 381 transitions, 5148 flow [2024-05-12 12:50:51,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:51,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:51,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:51,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 12:50:51,961 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:51,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash -780270418, now seen corresponding path program 26 times [2024-05-12 12:50:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:51,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081472140] [2024-05-12 12:50:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081472140] [2024-05-12 12:50:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081472140] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:52,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78570425] [2024-05-12 12:50:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:52,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 381 transitions, 5148 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:52,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:52,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:52,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:54,249 INFO L124 PetriNetUnfolderBase]: 6580/11419 cut-off events. [2024-05-12 12:50:54,249 INFO L125 PetriNetUnfolderBase]: For 628399/628489 co-relation queries the response was YES. [2024-05-12 12:50:54,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62330 conditions, 11419 events. 6580/11419 cut-off events. For 628399/628489 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 94409 event pairs, 2960 based on Foata normal form. 34/10985 useless extension candidates. Maximal degree in co-relation 62175. Up to 9174 conditions per place. [2024-05-12 12:50:54,367 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 298 selfloop transitions, 106 changer transitions 0/418 dead transitions. [2024-05-12 12:50:54,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 418 transitions, 6114 flow [2024-05-12 12:50:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:50:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:50:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-05-12 12:50:54,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966183574879227 [2024-05-12 12:50:54,368 INFO L175 Difference]: Start difference. First operand has 355 places, 381 transitions, 5148 flow. Second operand 9 states and 247 transitions. [2024-05-12 12:50:54,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 418 transitions, 6114 flow [2024-05-12 12:50:58,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 418 transitions, 5757 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:58,027 INFO L231 Difference]: Finished difference. Result has 357 places, 382 transitions, 5051 flow [2024-05-12 12:50:58,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5051, PETRI_PLACES=357, PETRI_TRANSITIONS=382} [2024-05-12 12:50:58,027 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 307 predicate places. [2024-05-12 12:50:58,027 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 382 transitions, 5051 flow [2024-05-12 12:50:58,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:58,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:58,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:58,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 12:50:58,028 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:58,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1247520626, now seen corresponding path program 27 times [2024-05-12 12:50:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:58,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165540770] [2024-05-12 12:50:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:58,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165540770] [2024-05-12 12:50:58,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165540770] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:58,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373289402] [2024-05-12 12:50:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:58,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:58,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:58,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:58,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:50:58,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 382 transitions, 5051 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:58,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:58,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:50:58,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:00,211 INFO L124 PetriNetUnfolderBase]: 6815/11879 cut-off events. [2024-05-12 12:51:00,211 INFO L125 PetriNetUnfolderBase]: For 614822/614937 co-relation queries the response was YES. [2024-05-12 12:51:00,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62954 conditions, 11879 events. 6815/11879 cut-off events. For 614822/614937 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 99345 event pairs, 2734 based on Foata normal form. 30/11442 useless extension candidates. Maximal degree in co-relation 62799. Up to 7367 conditions per place. [2024-05-12 12:51:00,353 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 301 selfloop transitions, 116 changer transitions 0/431 dead transitions. [2024-05-12 12:51:00,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 431 transitions, 6311 flow [2024-05-12 12:51:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:51:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:51:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-05-12 12:51:00,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 12:51:00,354 INFO L175 Difference]: Start difference. First operand has 357 places, 382 transitions, 5051 flow. Second operand 9 states and 258 transitions. [2024-05-12 12:51:00,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 431 transitions, 6311 flow [2024-05-12 12:51:03,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 431 transitions, 6089 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 12:51:03,879 INFO L231 Difference]: Finished difference. Result has 359 places, 383 transitions, 5103 flow [2024-05-12 12:51:03,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5103, PETRI_PLACES=359, PETRI_TRANSITIONS=383} [2024-05-12 12:51:03,879 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 309 predicate places. [2024-05-12 12:51:03,880 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 383 transitions, 5103 flow [2024-05-12 12:51:03,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:03,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:03,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:03,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 12:51:03,880 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:03,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash -580968628, now seen corresponding path program 28 times [2024-05-12 12:51:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:03,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038799889] [2024-05-12 12:51:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:04,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038799889] [2024-05-12 12:51:04,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038799889] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:04,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:04,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:04,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737422070] [2024-05-12 12:51:04,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:04,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:04,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:04,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:04,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:04,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:04,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 383 transitions, 5103 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:04,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:04,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:04,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:06,181 INFO L124 PetriNetUnfolderBase]: 7000/12171 cut-off events. [2024-05-12 12:51:06,181 INFO L125 PetriNetUnfolderBase]: For 597296/597411 co-relation queries the response was YES. [2024-05-12 12:51:06,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63473 conditions, 12171 events. 7000/12171 cut-off events. For 597296/597411 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 102035 event pairs, 3276 based on Foata normal form. 34/11710 useless extension candidates. Maximal degree in co-relation 63317. Up to 9866 conditions per place. [2024-05-12 12:51:06,306 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 292 selfloop transitions, 111 changer transitions 0/417 dead transitions. [2024-05-12 12:51:06,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 417 transitions, 6029 flow [2024-05-12 12:51:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:51:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:51:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 12:51:06,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 12:51:06,308 INFO L175 Difference]: Start difference. First operand has 359 places, 383 transitions, 5103 flow. Second operand 10 states and 265 transitions. [2024-05-12 12:51:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 417 transitions, 6029 flow [2024-05-12 12:51:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 417 transitions, 5751 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-05-12 12:51:10,248 INFO L231 Difference]: Finished difference. Result has 360 places, 383 transitions, 5061 flow [2024-05-12 12:51:10,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4825, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5061, PETRI_PLACES=360, PETRI_TRANSITIONS=383} [2024-05-12 12:51:10,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 310 predicate places. [2024-05-12 12:51:10,249 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 383 transitions, 5061 flow [2024-05-12 12:51:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:10,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:10,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-05-12 12:51:10,250 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:10,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1477576332, now seen corresponding path program 2 times [2024-05-12 12:51:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:10,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36508596] [2024-05-12 12:51:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36508596] [2024-05-12 12:51:10,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36508596] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:10,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:10,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162421691] [2024-05-12 12:51:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:10,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:10,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:10,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:10,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 383 transitions, 5061 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:10,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:10,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:10,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:12,528 INFO L124 PetriNetUnfolderBase]: 7053/12359 cut-off events. [2024-05-12 12:51:12,529 INFO L125 PetriNetUnfolderBase]: For 448873/449001 co-relation queries the response was YES. [2024-05-12 12:51:12,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63503 conditions, 12359 events. 7053/12359 cut-off events. For 448873/449001 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 104507 event pairs, 3221 based on Foata normal form. 6/11873 useless extension candidates. Maximal degree in co-relation 63348. Up to 10577 conditions per place. [2024-05-12 12:51:12,699 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 353 selfloop transitions, 53 changer transitions 0/420 dead transitions. [2024-05-12 12:51:12,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 420 transitions, 6061 flow [2024-05-12 12:51:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:51:12,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 12:51:12,702 INFO L175 Difference]: Start difference. First operand has 360 places, 383 transitions, 5061 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:51:12,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 420 transitions, 6061 flow [2024-05-12 12:51:15,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 420 transitions, 5783 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-05-12 12:51:15,829 INFO L231 Difference]: Finished difference. Result has 358 places, 386 transitions, 4976 flow [2024-05-12 12:51:15,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4976, PETRI_PLACES=358, PETRI_TRANSITIONS=386} [2024-05-12 12:51:15,830 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 308 predicate places. [2024-05-12 12:51:15,831 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 386 transitions, 4976 flow [2024-05-12 12:51:15,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:15,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:15,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-05-12 12:51:15,833 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:15,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1934272362, now seen corresponding path program 3 times [2024-05-12 12:51:15,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:15,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110507759] [2024-05-12 12:51:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:15,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110507759] [2024-05-12 12:51:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110507759] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:15,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:15,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:15,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582918188] [2024-05-12 12:51:15,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:15,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:15,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:16,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:16,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 386 transitions, 4976 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:16,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:16,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:16,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:18,312 INFO L124 PetriNetUnfolderBase]: 6918/12080 cut-off events. [2024-05-12 12:51:18,312 INFO L125 PetriNetUnfolderBase]: For 344966/345083 co-relation queries the response was YES. [2024-05-12 12:51:18,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60878 conditions, 12080 events. 6918/12080 cut-off events. For 344966/345083 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 101503 event pairs, 2536 based on Foata normal form. 6/11629 useless extension candidates. Maximal degree in co-relation 60722. Up to 9804 conditions per place. [2024-05-12 12:51:18,457 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 353 selfloop transitions, 67 changer transitions 0/434 dead transitions. [2024-05-12 12:51:18,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 434 transitions, 6258 flow [2024-05-12 12:51:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 12:51:18,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-05-12 12:51:18,459 INFO L175 Difference]: Start difference. First operand has 358 places, 386 transitions, 4976 flow. Second operand 8 states and 233 transitions. [2024-05-12 12:51:18,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 434 transitions, 6258 flow [2024-05-12 12:51:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 434 transitions, 6185 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:21,686 INFO L231 Difference]: Finished difference. Result has 364 places, 389 transitions, 5113 flow [2024-05-12 12:51:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5113, PETRI_PLACES=364, PETRI_TRANSITIONS=389} [2024-05-12 12:51:21,687 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 314 predicate places. [2024-05-12 12:51:21,687 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 389 transitions, 5113 flow [2024-05-12 12:51:21,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:21,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:21,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:21,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-05-12 12:51:21,688 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:21,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1940938602, now seen corresponding path program 4 times [2024-05-12 12:51:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:21,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732631236] [2024-05-12 12:51:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732631236] [2024-05-12 12:51:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732631236] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899220526] [2024-05-12 12:51:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:21,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 389 transitions, 5113 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:24,307 INFO L124 PetriNetUnfolderBase]: 6905/12276 cut-off events. [2024-05-12 12:51:24,308 INFO L125 PetriNetUnfolderBase]: For 321940/322057 co-relation queries the response was YES. [2024-05-12 12:51:24,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60991 conditions, 12276 events. 6905/12276 cut-off events. For 321940/322057 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 104448 event pairs, 2728 based on Foata normal form. 6/11810 useless extension candidates. Maximal degree in co-relation 60832. Up to 9798 conditions per place. [2024-05-12 12:51:24,439 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 350 selfloop transitions, 66 changer transitions 0/430 dead transitions. [2024-05-12 12:51:24,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 430 transitions, 6134 flow [2024-05-12 12:51:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:51:24,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 12:51:24,441 INFO L175 Difference]: Start difference. First operand has 364 places, 389 transitions, 5113 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:51:24,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 430 transitions, 6134 flow [2024-05-12 12:51:26,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 430 transitions, 5978 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:26,934 INFO L231 Difference]: Finished difference. Result has 367 places, 390 transitions, 5120 flow [2024-05-12 12:51:26,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5120, PETRI_PLACES=367, PETRI_TRANSITIONS=390} [2024-05-12 12:51:26,934 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 317 predicate places. [2024-05-12 12:51:26,934 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 390 transitions, 5120 flow [2024-05-12 12:51:26,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:26,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:26,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:26,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-05-12 12:51:26,935 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:26,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:26,935 INFO L85 PathProgramCache]: Analyzing trace with hash -573344116, now seen corresponding path program 5 times [2024-05-12 12:51:26,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:26,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020364603] [2024-05-12 12:51:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:26,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:27,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:27,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020364603] [2024-05-12 12:51:27,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020364603] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:27,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:27,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319728728] [2024-05-12 12:51:27,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:27,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:27,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:27,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 390 transitions, 5120 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:27,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:27,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:27,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:29,628 INFO L124 PetriNetUnfolderBase]: 7074/12402 cut-off events. [2024-05-12 12:51:29,629 INFO L125 PetriNetUnfolderBase]: For 418496/418569 co-relation queries the response was YES. [2024-05-12 12:51:29,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61161 conditions, 12402 events. 7074/12402 cut-off events. For 418496/418569 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 104609 event pairs, 2957 based on Foata normal form. 30/11968 useless extension candidates. Maximal degree in co-relation 61001. Up to 7946 conditions per place. [2024-05-12 12:51:29,766 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 297 selfloop transitions, 123 changer transitions 0/434 dead transitions. [2024-05-12 12:51:29,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 434 transitions, 6174 flow [2024-05-12 12:51:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 12:51:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 12:51:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-05-12 12:51:29,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891304347826087 [2024-05-12 12:51:29,768 INFO L175 Difference]: Start difference. First operand has 367 places, 390 transitions, 5120 flow. Second operand 10 states and 271 transitions. [2024-05-12 12:51:29,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 434 transitions, 6174 flow [2024-05-12 12:51:32,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 434 transitions, 6074 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:32,229 INFO L231 Difference]: Finished difference. Result has 373 places, 392 transitions, 5357 flow [2024-05-12 12:51:32,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5357, PETRI_PLACES=373, PETRI_TRANSITIONS=392} [2024-05-12 12:51:32,230 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-05-12 12:51:32,230 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 392 transitions, 5357 flow [2024-05-12 12:51:32,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:32,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:32,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-05-12 12:51:32,231 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1020710889, now seen corresponding path program 1 times [2024-05-12 12:51:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:32,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617651910] [2024-05-12 12:51:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:32,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:32,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:32,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617651910] [2024-05-12 12:51:32,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617651910] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:32,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:32,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:32,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542999279] [2024-05-12 12:51:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:32,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:32,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:32,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:32,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:32,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 392 transitions, 5357 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:32,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:32,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:32,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:35,019 INFO L124 PetriNetUnfolderBase]: 7285/13051 cut-off events. [2024-05-12 12:51:35,020 INFO L125 PetriNetUnfolderBase]: For 380425/380545 co-relation queries the response was YES. [2024-05-12 12:51:35,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65408 conditions, 13051 events. 7285/13051 cut-off events. For 380425/380545 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 112030 event pairs, 3015 based on Foata normal form. 6/12562 useless extension candidates. Maximal degree in co-relation 65246. Up to 10375 conditions per place. [2024-05-12 12:51:35,301 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 383 selfloop transitions, 50 changer transitions 0/447 dead transitions. [2024-05-12 12:51:35,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 447 transitions, 6879 flow [2024-05-12 12:51:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:51:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:51:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-05-12 12:51:35,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-05-12 12:51:35,302 INFO L175 Difference]: Start difference. First operand has 373 places, 392 transitions, 5357 flow. Second operand 9 states and 253 transitions. [2024-05-12 12:51:35,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 447 transitions, 6879 flow [2024-05-12 12:51:39,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 447 transitions, 6609 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-05-12 12:51:39,840 INFO L231 Difference]: Finished difference. Result has 373 places, 395 transitions, 5245 flow [2024-05-12 12:51:39,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5245, PETRI_PLACES=373, PETRI_TRANSITIONS=395} [2024-05-12 12:51:39,840 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-05-12 12:51:39,840 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 395 transitions, 5245 flow [2024-05-12 12:51:39,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:39,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:39,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-05-12 12:51:39,841 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:39,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -949845751, now seen corresponding path program 2 times [2024-05-12 12:51:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:39,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213634039] [2024-05-12 12:51:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:39,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:39,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213634039] [2024-05-12 12:51:39,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213634039] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:39,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:39,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:39,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320994732] [2024-05-12 12:51:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:39,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:39,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:39,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:39,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:40,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:40,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 395 transitions, 5245 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:40,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:40,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:40,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:42,629 INFO L124 PetriNetUnfolderBase]: 7272/12804 cut-off events. [2024-05-12 12:51:42,629 INFO L125 PetriNetUnfolderBase]: For 344976/345094 co-relation queries the response was YES. [2024-05-12 12:51:42,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63761 conditions, 12804 events. 7272/12804 cut-off events. For 344976/345094 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 109327 event pairs, 3264 based on Foata normal form. 6/12322 useless extension candidates. Maximal degree in co-relation 63600. Up to 11101 conditions per place. [2024-05-12 12:51:42,764 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 385 selfloop transitions, 34 changer transitions 0/433 dead transitions. [2024-05-12 12:51:42,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 433 transitions, 6201 flow [2024-05-12 12:51:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-05-12 12:51:42,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-05-12 12:51:42,765 INFO L175 Difference]: Start difference. First operand has 373 places, 395 transitions, 5245 flow. Second operand 8 states and 218 transitions. [2024-05-12 12:51:42,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 433 transitions, 6201 flow [2024-05-12 12:51:46,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 433 transitions, 6133 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:46,156 INFO L231 Difference]: Finished difference. Result has 377 places, 395 transitions, 5249 flow [2024-05-12 12:51:46,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5177, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5249, PETRI_PLACES=377, PETRI_TRANSITIONS=395} [2024-05-12 12:51:46,157 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 327 predicate places. [2024-05-12 12:51:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 395 transitions, 5249 flow [2024-05-12 12:51:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:46,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:46,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:46,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-05-12 12:51:46,157 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1724827671, now seen corresponding path program 3 times [2024-05-12 12:51:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958791075] [2024-05-12 12:51:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:46,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:46,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958791075] [2024-05-12 12:51:46,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958791075] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:46,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:46,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:46,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076398953] [2024-05-12 12:51:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:46,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:46,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:46,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 395 transitions, 5249 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:46,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:46,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:46,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:48,848 INFO L124 PetriNetUnfolderBase]: 7346/12987 cut-off events. [2024-05-12 12:51:48,849 INFO L125 PetriNetUnfolderBase]: For 363425/363548 co-relation queries the response was YES. [2024-05-12 12:51:48,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64288 conditions, 12987 events. 7346/12987 cut-off events. For 363425/363548 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 110707 event pairs, 3327 based on Foata normal form. 8/12480 useless extension candidates. Maximal degree in co-relation 64125. Up to 10847 conditions per place. [2024-05-12 12:51:49,002 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 385 selfloop transitions, 40 changer transitions 0/439 dead transitions. [2024-05-12 12:51:49,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 439 transitions, 6485 flow [2024-05-12 12:51:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 12:51:49,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 12:51:49,004 INFO L175 Difference]: Start difference. First operand has 377 places, 395 transitions, 5249 flow. Second operand 8 states and 224 transitions. [2024-05-12 12:51:49,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 439 transitions, 6485 flow [2024-05-12 12:51:53,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 439 transitions, 6385 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 12:51:53,310 INFO L231 Difference]: Finished difference. Result has 377 places, 396 transitions, 5247 flow [2024-05-12 12:51:53,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5149, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5247, PETRI_PLACES=377, PETRI_TRANSITIONS=396} [2024-05-12 12:51:53,311 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 327 predicate places. [2024-05-12 12:51:53,311 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 396 transitions, 5247 flow [2024-05-12 12:51:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:53,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-05-12 12:51:53,311 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:53,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1732446231, now seen corresponding path program 4 times [2024-05-12 12:51:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:53,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723762050] [2024-05-12 12:51:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723762050] [2024-05-12 12:51:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723762050] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:53,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104839531] [2024-05-12 12:51:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:53,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:53,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 396 transitions, 5247 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:53,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:53,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:53,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:56,104 INFO L124 PetriNetUnfolderBase]: 7328/12782 cut-off events. [2024-05-12 12:51:56,105 INFO L125 PetriNetUnfolderBase]: For 322695/322818 co-relation queries the response was YES. [2024-05-12 12:51:56,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63180 conditions, 12782 events. 7328/12782 cut-off events. For 322695/322818 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 108412 event pairs, 3504 based on Foata normal form. 8/12286 useless extension candidates. Maximal degree in co-relation 63016. Up to 11253 conditions per place. [2024-05-12 12:51:56,251 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 378 selfloop transitions, 37 changer transitions 0/429 dead transitions. [2024-05-12 12:51:56,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 429 transitions, 6187 flow [2024-05-12 12:51:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 12:51:56,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 12:51:56,252 INFO L175 Difference]: Start difference. First operand has 377 places, 396 transitions, 5247 flow. Second operand 8 states and 215 transitions. [2024-05-12 12:51:56,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 429 transitions, 6187 flow [2024-05-12 12:51:59,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 429 transitions, 6087 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 12:51:59,540 INFO L231 Difference]: Finished difference. Result has 379 places, 396 transitions, 5226 flow [2024-05-12 12:51:59,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5226, PETRI_PLACES=379, PETRI_TRANSITIONS=396} [2024-05-12 12:51:59,541 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 329 predicate places. [2024-05-12 12:51:59,541 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 396 transitions, 5226 flow [2024-05-12 12:51:59,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:59,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:59,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-05-12 12:51:59,542 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:59,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash -73772291, now seen corresponding path program 5 times [2024-05-12 12:51:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:59,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276976139] [2024-05-12 12:51:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:59,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276976139] [2024-05-12 12:51:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276976139] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146863875] [2024-05-12 12:51:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:59,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:51:59,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 396 transitions, 5226 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:59,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:59,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:51:59,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:02,410 INFO L124 PetriNetUnfolderBase]: 7494/13047 cut-off events. [2024-05-12 12:52:02,410 INFO L125 PetriNetUnfolderBase]: For 373077/373211 co-relation queries the response was YES. [2024-05-12 12:52:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65232 conditions, 13047 events. 7494/13047 cut-off events. For 373077/373211 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 110815 event pairs, 3540 based on Foata normal form. 16/12559 useless extension candidates. Maximal degree in co-relation 65067. Up to 11124 conditions per place. [2024-05-12 12:52:02,554 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 337 selfloop transitions, 87 changer transitions 0/438 dead transitions. [2024-05-12 12:52:02,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 438 transitions, 6474 flow [2024-05-12 12:52:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 12:52:02,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-05-12 12:52:02,555 INFO L175 Difference]: Start difference. First operand has 379 places, 396 transitions, 5226 flow. Second operand 8 states and 225 transitions. [2024-05-12 12:52:02,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 438 transitions, 6474 flow [2024-05-12 12:52:06,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 438 transitions, 6366 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 12:52:06,677 INFO L231 Difference]: Finished difference. Result has 379 places, 398 transitions, 5330 flow [2024-05-12 12:52:06,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5118, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5330, PETRI_PLACES=379, PETRI_TRANSITIONS=398} [2024-05-12 12:52:06,678 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 329 predicate places. [2024-05-12 12:52:06,678 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 398 transitions, 5330 flow [2024-05-12 12:52:06,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:06,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:06,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:06,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-05-12 12:52:06,679 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:06,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:06,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1116119417, now seen corresponding path program 6 times [2024-05-12 12:52:06,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:06,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340310937] [2024-05-12 12:52:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:06,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:06,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340310937] [2024-05-12 12:52:06,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340310937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:06,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:06,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:52:06,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328177657] [2024-05-12 12:52:06,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:06,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:52:06,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:06,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:52:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:52:06,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:52:06,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 398 transitions, 5330 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:06,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:06,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:52:06,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:09,473 INFO L124 PetriNetUnfolderBase]: 7568/13171 cut-off events. [2024-05-12 12:52:09,473 INFO L125 PetriNetUnfolderBase]: For 381864/382001 co-relation queries the response was YES. [2024-05-12 12:52:09,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65983 conditions, 13171 events. 7568/13171 cut-off events. For 381864/382001 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 111906 event pairs, 3618 based on Foata normal form. 16/12673 useless extension candidates. Maximal degree in co-relation 65818. Up to 11528 conditions per place. [2024-05-12 12:52:09,626 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 329 selfloop transitions, 86 changer transitions 0/429 dead transitions. [2024-05-12 12:52:09,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 429 transitions, 6280 flow [2024-05-12 12:52:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 12:52:09,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 12:52:09,628 INFO L175 Difference]: Start difference. First operand has 379 places, 398 transitions, 5330 flow. Second operand 8 states and 216 transitions. [2024-05-12 12:52:09,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 429 transitions, 6280 flow [2024-05-12 12:52:13,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 429 transitions, 6158 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 12:52:13,641 INFO L231 Difference]: Finished difference. Result has 383 places, 399 transitions, 5405 flow [2024-05-12 12:52:13,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5405, PETRI_PLACES=383, PETRI_TRANSITIONS=399} [2024-05-12 12:52:13,641 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 333 predicate places. [2024-05-12 12:52:13,641 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 399 transitions, 5405 flow [2024-05-12 12:52:13,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:13,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:13,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:13,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-05-12 12:52:13,642 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:13,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1016608837, now seen corresponding path program 7 times [2024-05-12 12:52:13,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:13,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420592949] [2024-05-12 12:52:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:13,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:13,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420592949] [2024-05-12 12:52:13,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420592949] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:13,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:13,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:52:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001654765] [2024-05-12 12:52:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:13,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:52:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:52:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:52:13,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:52:13,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 399 transitions, 5405 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:13,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:13,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:52:13,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:16,304 INFO L124 PetriNetUnfolderBase]: 7642/13295 cut-off events. [2024-05-12 12:52:16,304 INFO L125 PetriNetUnfolderBase]: For 386621/386761 co-relation queries the response was YES. [2024-05-12 12:52:16,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66531 conditions, 13295 events. 7642/13295 cut-off events. For 386621/386761 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 113230 event pairs, 3640 based on Foata normal form. 16/12791 useless extension candidates. Maximal degree in co-relation 66364. Up to 11642 conditions per place. [2024-05-12 12:52:16,664 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 328 selfloop transitions, 85 changer transitions 0/427 dead transitions. [2024-05-12 12:52:16,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 427 transitions, 6339 flow [2024-05-12 12:52:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 12:52:16,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 12:52:16,665 INFO L175 Difference]: Start difference. First operand has 383 places, 399 transitions, 5405 flow. Second operand 8 states and 213 transitions. [2024-05-12 12:52:16,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 427 transitions, 6339 flow [2024-05-12 12:52:20,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 427 transitions, 6166 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 12:52:20,756 INFO L231 Difference]: Finished difference. Result has 385 places, 400 transitions, 5423 flow [2024-05-12 12:52:20,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5423, PETRI_PLACES=385, PETRI_TRANSITIONS=400} [2024-05-12 12:52:20,756 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 335 predicate places. [2024-05-12 12:52:20,756 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 400 transitions, 5423 flow [2024-05-12 12:52:20,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:20,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:20,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:20,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-05-12 12:52:20,757 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:20,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash 142273511, now seen corresponding path program 8 times [2024-05-12 12:52:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:20,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791337381] [2024-05-12 12:52:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:20,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791337381] [2024-05-12 12:52:20,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791337381] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:20,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:20,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:52:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304768992] [2024-05-12 12:52:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:20,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:52:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:52:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:52:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:52:20,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 400 transitions, 5423 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:20,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:20,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:52:20,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:23,626 INFO L124 PetriNetUnfolderBase]: 7716/13418 cut-off events. [2024-05-12 12:52:23,627 INFO L125 PetriNetUnfolderBase]: For 393152/393287 co-relation queries the response was YES. [2024-05-12 12:52:23,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67246 conditions, 13418 events. 7716/13418 cut-off events. For 393152/393287 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 114488 event pairs, 3656 based on Foata normal form. 8/12896 useless extension candidates. Maximal degree in co-relation 67078. Up to 11858 conditions per place. [2024-05-12 12:52:23,781 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 378 selfloop transitions, 33 changer transitions 0/425 dead transitions. [2024-05-12 12:52:23,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 425 transitions, 6347 flow [2024-05-12 12:52:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 12:52:23,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 12:52:23,782 INFO L175 Difference]: Start difference. First operand has 385 places, 400 transitions, 5423 flow. Second operand 8 states and 207 transitions. [2024-05-12 12:52:23,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 425 transitions, 6347 flow [2024-05-12 12:52:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 425 transitions, 6174 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 12:52:28,035 INFO L231 Difference]: Finished difference. Result has 387 places, 401 transitions, 5339 flow [2024-05-12 12:52:28,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5250, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5339, PETRI_PLACES=387, PETRI_TRANSITIONS=401} [2024-05-12 12:52:28,035 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 337 predicate places. [2024-05-12 12:52:28,036 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 401 transitions, 5339 flow [2024-05-12 12:52:28,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:28,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:28,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:28,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-05-12 12:52:28,036 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:28,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash -535745589, now seen corresponding path program 1 times [2024-05-12 12:52:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:28,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534319602] [2024-05-12 12:52:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:28,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:28,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534319602] [2024-05-12 12:52:28,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534319602] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:28,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:28,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:52:28,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616873542] [2024-05-12 12:52:28,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:28,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:52:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:52:28,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:52:28,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:52:28,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 401 transitions, 5339 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:28,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:28,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:52:28,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:31,040 INFO L124 PetriNetUnfolderBase]: 7835/13829 cut-off events. [2024-05-12 12:52:31,040 INFO L125 PetriNetUnfolderBase]: For 424421/424564 co-relation queries the response was YES. [2024-05-12 12:52:31,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69024 conditions, 13829 events. 7835/13829 cut-off events. For 424421/424564 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 118699 event pairs, 3473 based on Foata normal form. 14/13301 useless extension candidates. Maximal degree in co-relation 68855. Up to 10549 conditions per place. [2024-05-12 12:52:31,185 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 333 selfloop transitions, 101 changer transitions 0/448 dead transitions. [2024-05-12 12:52:31,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 448 transitions, 6849 flow [2024-05-12 12:52:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 12:52:31,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-05-12 12:52:31,186 INFO L175 Difference]: Start difference. First operand has 387 places, 401 transitions, 5339 flow. Second operand 8 states and 229 transitions. [2024-05-12 12:52:31,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 448 transitions, 6849 flow [2024-05-12 12:52:36,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 448 transitions, 6778 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 12:52:36,208 INFO L231 Difference]: Finished difference. Result has 389 places, 403 transitions, 5512 flow [2024-05-12 12:52:36,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5512, PETRI_PLACES=389, PETRI_TRANSITIONS=403} [2024-05-12 12:52:36,209 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 339 predicate places. [2024-05-12 12:52:36,209 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 403 transitions, 5512 flow [2024-05-12 12:52:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:36,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:36,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-05-12 12:52:36,210 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:36,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1722258523, now seen corresponding path program 2 times [2024-05-12 12:52:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:36,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33648410] [2024-05-12 12:52:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:36,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33648410] [2024-05-12 12:52:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33648410] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:36,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:36,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:52:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835543398] [2024-05-12 12:52:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:36,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:52:36,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:52:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:52:36,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 12:52:36,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 403 transitions, 5512 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:36,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:36,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 12:52:36,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:39,592 INFO L124 PetriNetUnfolderBase]: 7888/14010 cut-off events. [2024-05-12 12:52:39,592 INFO L125 PetriNetUnfolderBase]: For 435589/435732 co-relation queries the response was YES. [2024-05-12 12:52:39,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70270 conditions, 14010 events. 7888/14010 cut-off events. For 435589/435732 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 121366 event pairs, 3418 based on Foata normal form. 14/13488 useless extension candidates. Maximal degree in co-relation 70100. Up to 10579 conditions per place. [2024-05-12 12:52:40,005 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 331 selfloop transitions, 101 changer transitions 0/446 dead transitions. [2024-05-12 12:52:40,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 446 transitions, 6790 flow [2024-05-12 12:52:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:52:40,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 12:52:40,006 INFO L175 Difference]: Start difference. First operand has 389 places, 403 transitions, 5512 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:52:40,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 446 transitions, 6790 flow