./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 18:37:13,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:37:13,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:37:13,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:37:13,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:37:13,495 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:37:13,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:37:13,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:37:13,497 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:37:13,500 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:37:13,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:37:13,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:37:13,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:37:13,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:37:13,503 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:37:13,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:37:13,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:37:13,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:37:13,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:37:13,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:37:13,504 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:37:13,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:37:13,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:37:13,505 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:37:13,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:37:13,505 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:37:13,505 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:37:13,506 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:37:13,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:37:13,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:37:13,507 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:37:13,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:37:13,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:37:13,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:37:13,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:37:13,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:37:13,508 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:37:13,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:37:13,509 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:37:13,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:37:13,509 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:37:13,509 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:37:13,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:37:13,510 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:37:13,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:37:13,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:37:13,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:37:13,773 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:37:13,773 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:37:13,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:37:14,832 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:37:15,037 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:37:15,041 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:37:15,051 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f66382ca/e54b0e4161ad40b099876e087cf115e3/FLAGcb42c5762 [2024-06-03 18:37:15,060 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f66382ca/e54b0e4161ad40b099876e087cf115e3 [2024-06-03 18:37:15,062 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:37:15,063 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:37:15,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 18:37:15,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:37:15,163 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:37:15,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:37:15,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:37:15,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:37:15,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:37:15" (1/2) ... [2024-06-03 18:37:15,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0ac1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:37:15, skipping insertion in model container [2024-06-03 18:37:15,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:37:15" (1/2) ... [2024-06-03 18:37:15,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@473c13ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:37:15, skipping insertion in model container [2024-06-03 18:37:15,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:37:15" (2/2) ... [2024-06-03 18:37:15,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0ac1ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15, skipping insertion in model container [2024-06-03 18:37:15,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:37:15" (2/2) ... [2024-06-03 18:37:15,172 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:37:15,212 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:37:15,214 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:37:15,214 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:37:15,214 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:37:15,214 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:37:15,214 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-03 18:37:15,252 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:37:15,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:37:15,534 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:37:15,610 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:37:15,651 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:37:15,651 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15 WrapperNode [2024-06-03 18:37:15,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:37:15,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:37:15,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:37:15,652 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:37:15,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,694 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-03 18:37:15,696 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:37:15,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:37:15,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:37:15,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:37:15,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,706 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,721 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 18:37:15,721 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,721 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,750 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:37:15,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:37:15,753 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:37:15,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:37:15,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (1/1) ... [2024-06-03 18:37:15,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:37:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:37:15,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 18:37:15,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 18:37:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:37:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:37:15,877 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:37:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:37:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:37:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:37:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 18:37:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 18:37:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:37:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:37:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:37:15,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:37:15,880 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:37:15,965 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:37:15,967 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:37:16,107 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:37:16,108 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:37:16,180 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:37:16,181 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:37:16,181 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:37:16 BoogieIcfgContainer [2024-06-03 18:37:16,181 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:37:16,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:37:16,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:37:16,185 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:37:16,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:37:15" (1/4) ... [2024-06-03 18:37:16,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350e94e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:37:16, skipping insertion in model container [2024-06-03 18:37:16,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:37:15" (2/4) ... [2024-06-03 18:37:16,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350e94e2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:37:16, skipping insertion in model container [2024-06-03 18:37:16,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:15" (3/4) ... [2024-06-03 18:37:16,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350e94e2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:37:16, skipping insertion in model container [2024-06-03 18:37:16,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:37:16" (4/4) ... [2024-06-03 18:37:16,186 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:37:16,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:37:16,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 18:37:16,200 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:37:16,227 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:37:16,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-03 18:37:16,269 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-03 18:37:16,270 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:37:16,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:37:16,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-03 18:37:16,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-03 18:37:16,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:37:16,290 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;@3f4dc704, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:37:16,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 18:37:16,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:37:16,299 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 18:37:16,299 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:37:16,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:16,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:37:16,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:16,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1909711783, now seen corresponding path program 1 times [2024-06-03 18:37:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:16,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770436167] [2024-06-03 18:37:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:16,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770436167] [2024-06-03 18:37:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770436167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:16,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:16,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:37:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949464481] [2024-06-03 18:37:16,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:37:16,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:37:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:37:16,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-03 18:37:16,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:16,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-03 18:37:16,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:16,965 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-03 18:37:16,966 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-03 18:37:16,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3931 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-03 18:37:16,978 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-03 18:37:16,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-03 18:37:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:37:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:37:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-03 18:37:16,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-03 18:37:16,990 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-03 18:37:16,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-03 18:37:16,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:16,994 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-03 18:37:16,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-03 18:37:16,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-03 18:37:16,998 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-03 18:37:16,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:16,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:16,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:37:16,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1086635544, now seen corresponding path program 1 times [2024-06-03 18:37:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507554144] [2024-06-03 18:37:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:17,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507554144] [2024-06-03 18:37:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507554144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:17,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:17,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:17,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721785618] [2024-06-03 18:37:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:17,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:17,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:17,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:17,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:17,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:17,350 INFO L124 PetriNetUnfolderBase]: 754/1255 cut-off events. [2024-06-03 18:37:17,351 INFO L125 PetriNetUnfolderBase]: For 194/197 co-relation queries the response was YES. [2024-06-03 18:37:17,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 1255 events. 754/1255 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6082 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-03 18:37:17,356 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 18:37:17,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 254 flow [2024-06-03 18:37:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 18:37:17,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-03 18:37:17,358 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 101 transitions. [2024-06-03 18:37:17,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 254 flow [2024-06-03 18:37:17,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:17,360 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-03 18:37:17,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-03 18:37:17,361 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-03 18:37:17,361 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-03 18:37:17,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:17,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:17,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:37:17,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2108259387, now seen corresponding path program 1 times [2024-06-03 18:37:17,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993568487] [2024-06-03 18:37:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993568487] [2024-06-03 18:37:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993568487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200734989] [2024-06-03 18:37:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:17,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:17,629 INFO L124 PetriNetUnfolderBase]: 745/1240 cut-off events. [2024-06-03 18:37:17,629 INFO L125 PetriNetUnfolderBase]: For 582/593 co-relation queries the response was YES. [2024-06-03 18:37:17,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 1240 events. 745/1240 cut-off events. For 582/593 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6014 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-03 18:37:17,635 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-03 18:37:17,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 314 flow [2024-06-03 18:37:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 18:37:17,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:17,636 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 120 transitions. [2024-06-03 18:37:17,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 314 flow [2024-06-03 18:37:17,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 312 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 18:37:17,638 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-03 18:37:17,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-03 18:37:17,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-03 18:37:17,639 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-03 18:37:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:17,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:37:17,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2090825248, now seen corresponding path program 1 times [2024-06-03 18:37:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989669724] [2024-06-03 18:37:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:17,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:17,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989669724] [2024-06-03 18:37:17,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989669724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:17,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:17,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:17,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452904177] [2024-06-03 18:37:17,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:17,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:17,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:17,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:17,901 INFO L124 PetriNetUnfolderBase]: 747/1229 cut-off events. [2024-06-03 18:37:17,901 INFO L125 PetriNetUnfolderBase]: For 1101/1104 co-relation queries the response was YES. [2024-06-03 18:37:17,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3432 conditions, 1229 events. 747/1229 cut-off events. For 1101/1104 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5848 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-03 18:37:17,908 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-03 18:37:17,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 393 flow [2024-06-03 18:37:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 18:37:17,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 18:37:17,910 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 100 transitions. [2024-06-03 18:37:17,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 393 flow [2024-06-03 18:37:17,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 368 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:17,913 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-03 18:37:17,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-03 18:37:17,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-03 18:37:17,914 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-03 18:37:17,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:17,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:17,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:37:17,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,915 INFO L85 PathProgramCache]: Analyzing trace with hash -104084423, now seen corresponding path program 1 times [2024-06-03 18:37:17,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915277638] [2024-06-03 18:37:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915277638] [2024-06-03 18:37:18,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915277638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:18,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464609068] [2024-06-03 18:37:18,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:18,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:18,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:18,171 INFO L124 PetriNetUnfolderBase]: 758/1286 cut-off events. [2024-06-03 18:37:18,172 INFO L125 PetriNetUnfolderBase]: For 1869/1886 co-relation queries the response was YES. [2024-06-03 18:37:18,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1286 events. 758/1286 cut-off events. For 1869/1886 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6349 event pairs, 280 based on Foata normal form. 14/1296 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-03 18:37:18,179 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-03 18:37:18,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 490 flow [2024-06-03 18:37:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 18:37:18,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-03 18:37:18,181 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 5 states and 123 transitions. [2024-06-03 18:37:18,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 490 flow [2024-06-03 18:37:18,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 484 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 18:37:18,185 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 317 flow [2024-06-03 18:37:18,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-03 18:37:18,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-03 18:37:18,186 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 317 flow [2024-06-03 18:37:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:18,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:37:18,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -671905851, now seen corresponding path program 2 times [2024-06-03 18:37:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269406868] [2024-06-03 18:37:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269406868] [2024-06-03 18:37:18,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269406868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778452864] [2024-06-03 18:37:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:18,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:18,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:18,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:18,470 INFO L124 PetriNetUnfolderBase]: 753/1279 cut-off events. [2024-06-03 18:37:18,471 INFO L125 PetriNetUnfolderBase]: For 2782/2799 co-relation queries the response was YES. [2024-06-03 18:37:18,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 1279 events. 753/1279 cut-off events. For 2782/2799 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6327 event pairs, 280 based on Foata normal form. 14/1289 useless extension candidates. Maximal degree in co-relation 4309. Up to 1089 conditions per place. [2024-06-03 18:37:18,477 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-03 18:37:18,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 488 flow [2024-06-03 18:37:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 18:37:18,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-03 18:37:18,478 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 317 flow. Second operand 4 states and 101 transitions. [2024-06-03 18:37:18,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 488 flow [2024-06-03 18:37:18,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 457 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:18,483 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 324 flow [2024-06-03 18:37:18,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-03 18:37:18,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-03 18:37:18,484 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 324 flow [2024-06-03 18:37:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:18,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:37:18,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:18,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash -671905665, now seen corresponding path program 1 times [2024-06-03 18:37:18,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:18,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145944289] [2024-06-03 18:37:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:18,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145944289] [2024-06-03 18:37:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145944289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:18,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050228477] [2024-06-03 18:37:18,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:18,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:18,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:18,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:18,751 INFO L124 PetriNetUnfolderBase]: 795/1325 cut-off events. [2024-06-03 18:37:18,751 INFO L125 PetriNetUnfolderBase]: For 3474/3491 co-relation queries the response was YES. [2024-06-03 18:37:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1325 events. 795/1325 cut-off events. For 3474/3491 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6511 event pairs, 253 based on Foata normal form. 15/1336 useless extension candidates. Maximal degree in co-relation 4652. Up to 1116 conditions per place. [2024-06-03 18:37:18,761 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-03 18:37:18,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 569 flow [2024-06-03 18:37:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 18:37:18,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:18,763 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 324 flow. Second operand 5 states and 120 transitions. [2024-06-03 18:37:18,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 569 flow [2024-06-03 18:37:18,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 543 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:18,769 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 433 flow [2024-06-03 18:37:18,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-06-03 18:37:18,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-03 18:37:18,771 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 433 flow [2024-06-03 18:37:18,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:18,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:18,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:37:18,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:18,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1318642083, now seen corresponding path program 2 times [2024-06-03 18:37:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:18,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77942083] [2024-06-03 18:37:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:18,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77942083] [2024-06-03 18:37:18,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77942083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:18,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809859417] [2024-06-03 18:37:18,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:18,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:18,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 433 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:18,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:19,054 INFO L124 PetriNetUnfolderBase]: 805/1336 cut-off events. [2024-06-03 18:37:19,054 INFO L125 PetriNetUnfolderBase]: For 4876/4896 co-relation queries the response was YES. [2024-06-03 18:37:19,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5304 conditions, 1336 events. 805/1336 cut-off events. For 4876/4896 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6534 event pairs, 267 based on Foata normal form. 17/1343 useless extension candidates. Maximal degree in co-relation 5274. Up to 1092 conditions per place. [2024-06-03 18:37:19,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 31 changer transitions 0/94 dead transitions. [2024-06-03 18:37:19,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 763 flow [2024-06-03 18:37:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 18:37:19,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-03 18:37:19,067 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 433 flow. Second operand 5 states and 124 transitions. [2024-06-03 18:37:19,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 763 flow [2024-06-03 18:37:19,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 732 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:19,076 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 584 flow [2024-06-03 18:37:19,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-03 18:37:19,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-03 18:37:19,079 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 584 flow [2024-06-03 18:37:19,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:19,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:19,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:37:19,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:19,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1318633155, now seen corresponding path program 1 times [2024-06-03 18:37:19,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:19,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253467056] [2024-06-03 18:37:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:19,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:19,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:19,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253467056] [2024-06-03 18:37:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253467056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587629616] [2024-06-03 18:37:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:19,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:19,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:19,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:19,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:19,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:19,397 INFO L124 PetriNetUnfolderBase]: 835/1397 cut-off events. [2024-06-03 18:37:19,398 INFO L125 PetriNetUnfolderBase]: For 5766/5775 co-relation queries the response was YES. [2024-06-03 18:37:19,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 1397 events. 835/1397 cut-off events. For 5766/5775 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6949 event pairs, 242 based on Foata normal form. 18/1410 useless extension candidates. Maximal degree in co-relation 5865. Up to 1175 conditions per place. [2024-06-03 18:37:19,407 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-06-03 18:37:19,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 898 flow [2024-06-03 18:37:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 18:37:19,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-03 18:37:19,408 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 584 flow. Second operand 5 states and 123 transitions. [2024-06-03 18:37:19,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 898 flow [2024-06-03 18:37:19,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 862 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-03 18:37:19,416 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 608 flow [2024-06-03 18:37:19,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-03 18:37:19,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-03 18:37:19,417 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 608 flow [2024-06-03 18:37:19,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:19,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:19,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:37:19,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:19,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2655179, now seen corresponding path program 1 times [2024-06-03 18:37:19,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:19,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614212239] [2024-06-03 18:37:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:19,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614212239] [2024-06-03 18:37:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614212239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:19,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:37:19,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622900101] [2024-06-03 18:37:19,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:19,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:37:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:37:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:37:19,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:19,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:19,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:19,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:19,634 INFO L124 PetriNetUnfolderBase]: 760/1285 cut-off events. [2024-06-03 18:37:19,634 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-03 18:37:19,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1285 events. 760/1285 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6406 event pairs, 246 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 5371. Up to 1115 conditions per place. [2024-06-03 18:37:19,643 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 66 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-03 18:37:19,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 803 flow [2024-06-03 18:37:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-03 18:37:19,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-03 18:37:19,644 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 608 flow. Second operand 4 states and 97 transitions. [2024-06-03 18:37:19,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 803 flow [2024-06-03 18:37:19,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 769 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:19,650 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 639 flow [2024-06-03 18:37:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=639, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-03 18:37:19,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-03 18:37:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 639 flow [2024-06-03 18:37:19,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:19,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:37:19,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:19,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1068351291, now seen corresponding path program 1 times [2024-06-03 18:37:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:19,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921735599] [2024-06-03 18:37:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921735599] [2024-06-03 18:37:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921735599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128193788] [2024-06-03 18:37:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:19,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:19,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 639 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:19,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:19,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:19,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:20,037 INFO L124 PetriNetUnfolderBase]: 886/1494 cut-off events. [2024-06-03 18:37:20,037 INFO L125 PetriNetUnfolderBase]: For 6899/6919 co-relation queries the response was YES. [2024-06-03 18:37:20,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1494 events. 886/1494 cut-off events. For 6899/6919 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7624 event pairs, 249 based on Foata normal form. 17/1507 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-03 18:37:20,047 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-03 18:37:20,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 1157 flow [2024-06-03 18:37:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 18:37:20,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-03 18:37:20,048 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 639 flow. Second operand 9 states and 211 transitions. [2024-06-03 18:37:20,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 1157 flow [2024-06-03 18:37:20,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1145 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:20,058 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 833 flow [2024-06-03 18:37:20,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=833, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-03 18:37:20,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-03 18:37:20,059 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 833 flow [2024-06-03 18:37:20,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:20,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:20,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:37:20,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:20,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 645761787, now seen corresponding path program 2 times [2024-06-03 18:37:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:20,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131929458] [2024-06-03 18:37:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:20,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131929458] [2024-06-03 18:37:20,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131929458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:20,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:20,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:20,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037402851] [2024-06-03 18:37:20,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:20,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:20,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:20,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:20,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:20,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:20,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:20,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:20,442 INFO L124 PetriNetUnfolderBase]: 912/1541 cut-off events. [2024-06-03 18:37:20,442 INFO L125 PetriNetUnfolderBase]: For 9498/9518 co-relation queries the response was YES. [2024-06-03 18:37:20,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 1541 events. 912/1541 cut-off events. For 9498/9518 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7928 event pairs, 250 based on Foata normal form. 17/1554 useless extension candidates. Maximal degree in co-relation 7149. Up to 1213 conditions per place. [2024-06-03 18:37:20,455 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-03 18:37:20,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1349 flow [2024-06-03 18:37:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 18:37:20,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-03 18:37:20,456 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 833 flow. Second operand 8 states and 191 transitions. [2024-06-03 18:37:20,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1349 flow [2024-06-03 18:37:20,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1244 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:20,472 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 939 flow [2024-06-03 18:37:20,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-03 18:37:20,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-03 18:37:20,473 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 939 flow [2024-06-03 18:37:20,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:20,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:20,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:20,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:37:20,474 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:20,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash 645756207, now seen corresponding path program 3 times [2024-06-03 18:37:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:20,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579429086] [2024-06-03 18:37:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:20,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579429086] [2024-06-03 18:37:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579429086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:20,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027009752] [2024-06-03 18:37:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:20,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:20,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:20,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:20,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 939 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:20,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:20,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:20,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:20,863 INFO L124 PetriNetUnfolderBase]: 906/1533 cut-off events. [2024-06-03 18:37:20,863 INFO L125 PetriNetUnfolderBase]: For 10801/10818 co-relation queries the response was YES. [2024-06-03 18:37:20,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1533 events. 906/1533 cut-off events. For 10801/10818 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7895 event pairs, 250 based on Foata normal form. 15/1544 useless extension candidates. Maximal degree in co-relation 7363. Up to 1209 conditions per place. [2024-06-03 18:37:20,873 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 83 selfloop transitions, 37 changer transitions 0/126 dead transitions. [2024-06-03 18:37:20,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1291 flow [2024-06-03 18:37:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 18:37:20,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 18:37:20,875 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 939 flow. Second operand 6 states and 150 transitions. [2024-06-03 18:37:20,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1291 flow [2024-06-03 18:37:20,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1212 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:20,891 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 944 flow [2024-06-03 18:37:20,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=944, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-03 18:37:20,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-03 18:37:20,892 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 944 flow [2024-06-03 18:37:20,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:20,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:20,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:20,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:37:20,893 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:20,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2071769309, now seen corresponding path program 4 times [2024-06-03 18:37:20,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:20,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329227097] [2024-06-03 18:37:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329227097] [2024-06-03 18:37:21,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329227097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:21,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:21,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931885022] [2024-06-03 18:37:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:21,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:21,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:21,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:21,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 944 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:21,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:21,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:21,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:21,281 INFO L124 PetriNetUnfolderBase]: 930/1569 cut-off events. [2024-06-03 18:37:21,281 INFO L125 PetriNetUnfolderBase]: For 12408/12425 co-relation queries the response was YES. [2024-06-03 18:37:21,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7798 conditions, 1569 events. 930/1569 cut-off events. For 12408/12425 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8107 event pairs, 255 based on Foata normal form. 15/1574 useless extension candidates. Maximal degree in co-relation 7751. Up to 1171 conditions per place. [2024-06-03 18:37:21,291 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-03 18:37:21,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 148 transitions, 1528 flow [2024-06-03 18:37:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 18:37:21,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-03 18:37:21,293 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 944 flow. Second operand 8 states and 194 transitions. [2024-06-03 18:37:21,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 148 transitions, 1528 flow [2024-06-03 18:37:21,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 1454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:21,306 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1144 flow [2024-06-03 18:37:21,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-03 18:37:21,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-03 18:37:21,307 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1144 flow [2024-06-03 18:37:21,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:21,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:21,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:21,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:37:21,307 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:21,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash 505754820, now seen corresponding path program 1 times [2024-06-03 18:37:21,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544349806] [2024-06-03 18:37:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:21,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:21,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544349806] [2024-06-03 18:37:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544349806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:21,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:21,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:21,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112339997] [2024-06-03 18:37:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:21,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:21,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1144 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:21,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:21,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:21,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:21,682 INFO L124 PetriNetUnfolderBase]: 947/1598 cut-off events. [2024-06-03 18:37:21,682 INFO L125 PetriNetUnfolderBase]: For 15451/15468 co-relation queries the response was YES. [2024-06-03 18:37:21,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 1598 events. 947/1598 cut-off events. For 15451/15468 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8291 event pairs, 164 based on Foata normal form. 16/1610 useless extension candidates. Maximal degree in co-relation 8520. Up to 1278 conditions per place. [2024-06-03 18:37:21,699 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-06-03 18:37:21,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 143 transitions, 1604 flow [2024-06-03 18:37:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:37:21,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:21,701 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1144 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:37:21,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 143 transitions, 1604 flow [2024-06-03 18:37:21,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1500 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:21,725 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 1169 flow [2024-06-03 18:37:21,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1169, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2024-06-03 18:37:21,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-03 18:37:21,726 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 1169 flow [2024-06-03 18:37:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:21,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:21,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:21,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:37:21,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:21,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash 619434300, now seen corresponding path program 2 times [2024-06-03 18:37:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:21,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712656007] [2024-06-03 18:37:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:21,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712656007] [2024-06-03 18:37:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712656007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:21,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:21,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455349481] [2024-06-03 18:37:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:21,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:21,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 1169 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:21,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:22,095 INFO L124 PetriNetUnfolderBase]: 964/1625 cut-off events. [2024-06-03 18:37:22,096 INFO L125 PetriNetUnfolderBase]: For 16927/16944 co-relation queries the response was YES. [2024-06-03 18:37:22,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1625 events. 964/1625 cut-off events. For 16927/16944 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8440 event pairs, 235 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 8781. Up to 1369 conditions per place. [2024-06-03 18:37:22,111 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-03 18:37:22,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1537 flow [2024-06-03 18:37:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:37:22,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-03 18:37:22,112 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 1169 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:37:22,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1537 flow [2024-06-03 18:37:22,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1464 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:22,141 INFO L231 Difference]: Finished difference. Result has 103 places, 119 transitions, 1185 flow [2024-06-03 18:37:22,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1185, PETRI_PLACES=103, PETRI_TRANSITIONS=119} [2024-06-03 18:37:22,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-03 18:37:22,142 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 119 transitions, 1185 flow [2024-06-03 18:37:22,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:22,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:22,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:22,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:37:22,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:22,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1456397884, now seen corresponding path program 3 times [2024-06-03 18:37:22,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:22,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155471137] [2024-06-03 18:37:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:22,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:22,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:22,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155471137] [2024-06-03 18:37:22,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155471137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:22,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:22,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:22,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825777229] [2024-06-03 18:37:22,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:22,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:22,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:22,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 119 transitions, 1185 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:22,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:22,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:22,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:22,523 INFO L124 PetriNetUnfolderBase]: 956/1613 cut-off events. [2024-06-03 18:37:22,523 INFO L125 PetriNetUnfolderBase]: For 17752/17769 co-relation queries the response was YES. [2024-06-03 18:37:22,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 1613 events. 956/1613 cut-off events. For 17752/17769 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8358 event pairs, 162 based on Foata normal form. 16/1625 useless extension candidates. Maximal degree in co-relation 8674. Up to 1336 conditions per place. [2024-06-03 18:37:22,535 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-03 18:37:22,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1497 flow [2024-06-03 18:37:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 18:37:22,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-03 18:37:22,537 INFO L175 Difference]: Start difference. First operand has 103 places, 119 transitions, 1185 flow. Second operand 5 states and 122 transitions. [2024-06-03 18:37:22,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1497 flow [2024-06-03 18:37:22,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1426 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:22,565 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 1162 flow [2024-06-03 18:37:22,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1162, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-03 18:37:22,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-03 18:37:22,565 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 1162 flow [2024-06-03 18:37:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:22,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:22,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:37:22,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:22,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1456213186, now seen corresponding path program 1 times [2024-06-03 18:37:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97040907] [2024-06-03 18:37:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:22,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:22,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97040907] [2024-06-03 18:37:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97040907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:22,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:22,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516970861] [2024-06-03 18:37:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:22,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:22,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:22,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 1162 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:22,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:22,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:22,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:22,935 INFO L124 PetriNetUnfolderBase]: 1011/1700 cut-off events. [2024-06-03 18:37:22,935 INFO L125 PetriNetUnfolderBase]: For 20528/20545 co-relation queries the response was YES. [2024-06-03 18:37:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 1700 events. 1011/1700 cut-off events. For 20528/20545 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8878 event pairs, 213 based on Foata normal form. 24/1720 useless extension candidates. Maximal degree in co-relation 9073. Up to 1334 conditions per place. [2024-06-03 18:37:22,948 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-06-03 18:37:22,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1574 flow [2024-06-03 18:37:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:37:22,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:22,949 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 1162 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:37:22,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1574 flow [2024-06-03 18:37:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1529 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:22,978 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1221 flow [2024-06-03 18:37:22,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1221, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-06-03 18:37:22,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-03 18:37:22,978 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1221 flow [2024-06-03 18:37:22,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:22,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:22,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:22,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:37:22,979 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:22,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash -136175702, now seen corresponding path program 1 times [2024-06-03 18:37:22,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:22,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436678973] [2024-06-03 18:37:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:22,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:23,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:23,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436678973] [2024-06-03 18:37:23,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436678973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:23,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:23,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:23,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915615955] [2024-06-03 18:37:23,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:23,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:23,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:23,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:23,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1221 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:23,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:23,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:23,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:23,281 INFO L124 PetriNetUnfolderBase]: 937/1589 cut-off events. [2024-06-03 18:37:23,282 INFO L125 PetriNetUnfolderBase]: For 20714/20723 co-relation queries the response was YES. [2024-06-03 18:37:23,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8854 conditions, 1589 events. 937/1589 cut-off events. For 20714/20723 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8325 event pairs, 214 based on Foata normal form. 8/1576 useless extension candidates. Maximal degree in co-relation 8799. Up to 1337 conditions per place. [2024-06-03 18:37:23,294 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 96 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-03 18:37:23,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1493 flow [2024-06-03 18:37:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 18:37:23,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:23,295 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1221 flow. Second operand 5 states and 120 transitions. [2024-06-03 18:37:23,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1493 flow [2024-06-03 18:37:23,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1417 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:23,323 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1211 flow [2024-06-03 18:37:23,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1211, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-03 18:37:23,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-03 18:37:23,324 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1211 flow [2024-06-03 18:37:23,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:23,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:23,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:37:23,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:23,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1817930080, now seen corresponding path program 2 times [2024-06-03 18:37:23,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084039773] [2024-06-03 18:37:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:23,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:23,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084039773] [2024-06-03 18:37:23,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084039773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:23,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:23,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750746413] [2024-06-03 18:37:23,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:23,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:23,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:23,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:23,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1211 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:23,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:23,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:23,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:23,689 INFO L124 PetriNetUnfolderBase]: 1033/1729 cut-off events. [2024-06-03 18:37:23,690 INFO L125 PetriNetUnfolderBase]: For 24049/24066 co-relation queries the response was YES. [2024-06-03 18:37:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1729 events. 1033/1729 cut-off events. For 24049/24066 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9028 event pairs, 244 based on Foata normal form. 24/1743 useless extension candidates. Maximal degree in co-relation 9420. Up to 1402 conditions per place. [2024-06-03 18:37:23,701 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 33 changer transitions 0/149 dead transitions. [2024-06-03 18:37:23,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1689 flow [2024-06-03 18:37:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 18:37:23,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-03 18:37:23,702 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1211 flow. Second operand 6 states and 147 transitions. [2024-06-03 18:37:23,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1689 flow [2024-06-03 18:37:23,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1626 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:23,733 INFO L231 Difference]: Finished difference. Result has 108 places, 123 transitions, 1264 flow [2024-06-03 18:37:23,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1264, PETRI_PLACES=108, PETRI_TRANSITIONS=123} [2024-06-03 18:37:23,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-03 18:37:23,734 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 123 transitions, 1264 flow [2024-06-03 18:37:23,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:23,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:23,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:23,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:37:23,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:23,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash -191082084, now seen corresponding path program 3 times [2024-06-03 18:37:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773358987] [2024-06-03 18:37:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:23,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:23,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:23,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773358987] [2024-06-03 18:37:23,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773358987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:23,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:23,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:23,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71454971] [2024-06-03 18:37:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:23,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:23,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:23,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:23,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:23,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:23,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:24,107 INFO L124 PetriNetUnfolderBase]: 1099/1831 cut-off events. [2024-06-03 18:37:24,107 INFO L125 PetriNetUnfolderBase]: For 25561/25578 co-relation queries the response was YES. [2024-06-03 18:37:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 1831 events. 1099/1831 cut-off events. For 25561/25578 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9661 event pairs, 225 based on Foata normal form. 24/1845 useless extension candidates. Maximal degree in co-relation 10067. Up to 1285 conditions per place. [2024-06-03 18:37:24,122 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-03 18:37:24,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 157 transitions, 1834 flow [2024-06-03 18:37:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 18:37:24,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-03 18:37:24,123 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 1264 flow. Second operand 6 states and 151 transitions. [2024-06-03 18:37:24,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 157 transitions, 1834 flow [2024-06-03 18:37:24,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:24,162 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1311 flow [2024-06-03 18:37:24,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-03 18:37:24,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-03 18:37:24,163 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1311 flow [2024-06-03 18:37:24,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-03 18:37:24,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:24,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:37:24,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:24,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1743306966, now seen corresponding path program 2 times [2024-06-03 18:37:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:24,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617744211] [2024-06-03 18:37:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617744211] [2024-06-03 18:37:24,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617744211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:24,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813431663] [2024-06-03 18:37:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:24,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:24,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:24,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:24,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:24,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1311 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:24,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:24,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:24,447 INFO L124 PetriNetUnfolderBase]: 1047/1751 cut-off events. [2024-06-03 18:37:24,447 INFO L125 PetriNetUnfolderBase]: For 26339/26348 co-relation queries the response was YES. [2024-06-03 18:37:24,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1751 events. 1047/1751 cut-off events. For 26339/26348 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9315 event pairs, 262 based on Foata normal form. 8/1734 useless extension candidates. Maximal degree in co-relation 9920. Up to 1481 conditions per place. [2024-06-03 18:37:24,461 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 92 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-03 18:37:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1706 flow [2024-06-03 18:37:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 18:37:24,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:24,463 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1311 flow. Second operand 5 states and 120 transitions. [2024-06-03 18:37:24,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1706 flow [2024-06-03 18:37:24,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1633 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:24,495 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 1354 flow [2024-06-03 18:37:24,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1354, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-03 18:37:24,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-03 18:37:24,496 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 1354 flow [2024-06-03 18:37:24,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:24,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:24,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:37:24,497 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:24,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1349607368, now seen corresponding path program 1 times [2024-06-03 18:37:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:24,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081314638] [2024-06-03 18:37:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:24,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081314638] [2024-06-03 18:37:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081314638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:24,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144788774] [2024-06-03 18:37:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:24,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:24,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:24,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 1354 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:24,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:24,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:24,774 INFO L124 PetriNetUnfolderBase]: 1061/1783 cut-off events. [2024-06-03 18:37:24,774 INFO L125 PetriNetUnfolderBase]: For 28557/28562 co-relation queries the response was YES. [2024-06-03 18:37:24,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10074 conditions, 1783 events. 1061/1783 cut-off events. For 28557/28562 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9489 event pairs, 247 based on Foata normal form. 15/1779 useless extension candidates. Maximal degree in co-relation 10015. Up to 1534 conditions per place. [2024-06-03 18:37:24,790 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-06-03 18:37:24,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1684 flow [2024-06-03 18:37:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 18:37:24,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-03 18:37:24,791 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 1354 flow. Second operand 5 states and 118 transitions. [2024-06-03 18:37:24,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1684 flow [2024-06-03 18:37:24,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1579 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:24,825 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1307 flow [2024-06-03 18:37:24,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-03 18:37:24,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-03 18:37:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1307 flow [2024-06-03 18:37:24,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:24,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:24,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:37:24,827 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:24,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:24,827 INFO L85 PathProgramCache]: Analyzing trace with hash -288866032, now seen corresponding path program 1 times [2024-06-03 18:37:24,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:24,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801529030] [2024-06-03 18:37:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:24,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801529030] [2024-06-03 18:37:24,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801529030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:24,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654180064] [2024-06-03 18:37:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:24,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:24,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1307 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:24,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:24,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:25,348 INFO L124 PetriNetUnfolderBase]: 1679/2880 cut-off events. [2024-06-03 18:37:25,348 INFO L125 PetriNetUnfolderBase]: For 56905/56922 co-relation queries the response was YES. [2024-06-03 18:37:25,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16090 conditions, 2880 events. 1679/2880 cut-off events. For 56905/56922 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17470 event pairs, 441 based on Foata normal form. 48/2924 useless extension candidates. Maximal degree in co-relation 16032. Up to 1290 conditions per place. [2024-06-03 18:37:25,370 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 138 selfloop transitions, 49 changer transitions 0/193 dead transitions. [2024-06-03 18:37:25,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 2157 flow [2024-06-03 18:37:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-03 18:37:25,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-03 18:37:25,373 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1307 flow. Second operand 9 states and 227 transitions. [2024-06-03 18:37:25,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 2157 flow [2024-06-03 18:37:25,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 193 transitions, 2121 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:25,432 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1463 flow [2024-06-03 18:37:25,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1463, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-03 18:37:25,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-03 18:37:25,433 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1463 flow [2024-06-03 18:37:25,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:25,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:25,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:25,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:37:25,433 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:25,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1499594706, now seen corresponding path program 2 times [2024-06-03 18:37:25,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:25,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302804262] [2024-06-03 18:37:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:25,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:25,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302804262] [2024-06-03 18:37:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302804262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:25,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:25,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:25,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299847331] [2024-06-03 18:37:25,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:25,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:25,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:25,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:25,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:25,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:25,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:26,081 INFO L124 PetriNetUnfolderBase]: 2069/3572 cut-off events. [2024-06-03 18:37:26,081 INFO L125 PetriNetUnfolderBase]: For 80352/80369 co-relation queries the response was YES. [2024-06-03 18:37:26,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20587 conditions, 3572 events. 2069/3572 cut-off events. For 80352/80369 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23114 event pairs, 724 based on Foata normal form. 48/3616 useless extension candidates. Maximal degree in co-relation 20526. Up to 2374 conditions per place. [2024-06-03 18:37:26,117 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-03 18:37:26,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 192 transitions, 2275 flow [2024-06-03 18:37:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:37:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:37:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-03 18:37:26,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-03 18:37:26,119 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1463 flow. Second operand 10 states and 243 transitions. [2024-06-03 18:37:26,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 192 transitions, 2275 flow [2024-06-03 18:37:26,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 192 transitions, 2171 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:26,278 INFO L231 Difference]: Finished difference. Result has 128 places, 136 transitions, 1528 flow [2024-06-03 18:37:26,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1528, PETRI_PLACES=128, PETRI_TRANSITIONS=136} [2024-06-03 18:37:26,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-03 18:37:26,279 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 136 transitions, 1528 flow [2024-06-03 18:37:26,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:26,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:26,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:26,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:37:26,280 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:26,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1412755026, now seen corresponding path program 3 times [2024-06-03 18:37:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853741231] [2024-06-03 18:37:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:26,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853741231] [2024-06-03 18:37:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853741231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:26,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013295011] [2024-06-03 18:37:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:26,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:26,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:26,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 136 transitions, 1528 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:26,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:26,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:26,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:26,953 INFO L124 PetriNetUnfolderBase]: 2142/3715 cut-off events. [2024-06-03 18:37:26,953 INFO L125 PetriNetUnfolderBase]: For 84258/84275 co-relation queries the response was YES. [2024-06-03 18:37:26,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20957 conditions, 3715 events. 2142/3715 cut-off events. For 84258/84275 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24247 event pairs, 855 based on Foata normal form. 54/3763 useless extension candidates. Maximal degree in co-relation 20894. Up to 2945 conditions per place. [2024-06-03 18:37:26,982 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-03 18:37:26,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 2144 flow [2024-06-03 18:37:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:37:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:37:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-03 18:37:26,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-03 18:37:26,984 INFO L175 Difference]: Start difference. First operand has 128 places, 136 transitions, 1528 flow. Second operand 10 states and 233 transitions. [2024-06-03 18:37:26,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 2144 flow [2024-06-03 18:37:27,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2025 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:27,073 INFO L231 Difference]: Finished difference. Result has 131 places, 137 transitions, 1551 flow [2024-06-03 18:37:27,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1551, PETRI_PLACES=131, PETRI_TRANSITIONS=137} [2024-06-03 18:37:27,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-03 18:37:27,074 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 137 transitions, 1551 flow [2024-06-03 18:37:27,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:27,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:27,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:37:27,075 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:27,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash 73223106, now seen corresponding path program 1 times [2024-06-03 18:37:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:27,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570638429] [2024-06-03 18:37:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:27,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:27,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:27,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570638429] [2024-06-03 18:37:27,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570638429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:27,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:27,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042146129] [2024-06-03 18:37:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:27,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:27,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 137 transitions, 1551 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:27,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:27,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:27,697 INFO L124 PetriNetUnfolderBase]: 2147/3724 cut-off events. [2024-06-03 18:37:27,697 INFO L125 PetriNetUnfolderBase]: For 76297/76308 co-relation queries the response was YES. [2024-06-03 18:37:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21115 conditions, 3724 events. 2147/3724 cut-off events. For 76297/76308 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24285 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21051. Up to 3375 conditions per place. [2024-06-03 18:37:27,722 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 141 selfloop transitions, 19 changer transitions 0/166 dead transitions. [2024-06-03 18:37:27,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 166 transitions, 2135 flow [2024-06-03 18:37:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 18:37:27,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-03 18:37:27,723 INFO L175 Difference]: Start difference. First operand has 131 places, 137 transitions, 1551 flow. Second operand 7 states and 151 transitions. [2024-06-03 18:37:27,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 166 transitions, 2135 flow [2024-06-03 18:37:27,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1995 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:27,819 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1641 flow [2024-06-03 18:37:27,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1641, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-03 18:37:27,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-03 18:37:27,820 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1641 flow [2024-06-03 18:37:27,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:27,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:27,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:37:27,820 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:27,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash -473022442, now seen corresponding path program 4 times [2024-06-03 18:37:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291421738] [2024-06-03 18:37:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291421738] [2024-06-03 18:37:27,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291421738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:27,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238933734] [2024-06-03 18:37:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:27,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:27,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:27,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1641 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:27,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:27,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:28,449 INFO L124 PetriNetUnfolderBase]: 2281/3932 cut-off events. [2024-06-03 18:37:28,450 INFO L125 PetriNetUnfolderBase]: For 97106/97123 co-relation queries the response was YES. [2024-06-03 18:37:28,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22003 conditions, 3932 events. 2281/3932 cut-off events. For 97106/97123 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25827 event pairs, 888 based on Foata normal form. 54/3978 useless extension candidates. Maximal degree in co-relation 21937. Up to 3264 conditions per place. [2024-06-03 18:37:28,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 51 changer transitions 3/186 dead transitions. [2024-06-03 18:37:28,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 186 transitions, 2203 flow [2024-06-03 18:37:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 18:37:28,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-03 18:37:28,488 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1641 flow. Second operand 9 states and 212 transitions. [2024-06-03 18:37:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 186 transitions, 2203 flow [2024-06-03 18:37:28,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 2176 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:28,593 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 1749 flow [2024-06-03 18:37:28,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2024-06-03 18:37:28,594 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-03 18:37:28,594 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 1749 flow [2024-06-03 18:37:28,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:28,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:28,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:28,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:37:28,595 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:28,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2096454830, now seen corresponding path program 5 times [2024-06-03 18:37:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:28,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099117018] [2024-06-03 18:37:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:28,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:28,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099117018] [2024-06-03 18:37:28,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099117018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:28,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:28,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:28,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332492111] [2024-06-03 18:37:28,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:28,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:28,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:28,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:28,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:28,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:28,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 1749 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:28,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:28,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:28,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:29,236 INFO L124 PetriNetUnfolderBase]: 2405/4178 cut-off events. [2024-06-03 18:37:29,237 INFO L125 PetriNetUnfolderBase]: For 104255/104272 co-relation queries the response was YES. [2024-06-03 18:37:29,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23291 conditions, 4178 events. 2405/4178 cut-off events. For 104255/104272 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27873 event pairs, 967 based on Foata normal form. 54/4228 useless extension candidates. Maximal degree in co-relation 23223. Up to 3434 conditions per place. [2024-06-03 18:37:29,272 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2024-06-03 18:37:29,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 2293 flow [2024-06-03 18:37:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:37:29,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-03 18:37:29,273 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 1749 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:37:29,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 2293 flow [2024-06-03 18:37:29,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 181 transitions, 2164 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:29,397 INFO L231 Difference]: Finished difference. Result has 138 places, 148 transitions, 1760 flow [2024-06-03 18:37:29,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=138, PETRI_TRANSITIONS=148} [2024-06-03 18:37:29,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-03 18:37:29,398 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 148 transitions, 1760 flow [2024-06-03 18:37:29,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:29,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:29,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:37:29,399 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:29,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2096306960, now seen corresponding path program 6 times [2024-06-03 18:37:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:29,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185614036] [2024-06-03 18:37:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185614036] [2024-06-03 18:37:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185614036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:29,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:29,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:29,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119234431] [2024-06-03 18:37:29,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:29,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:29,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:29,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:29,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 148 transitions, 1760 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:29,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:29,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:29,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:30,073 INFO L124 PetriNetUnfolderBase]: 2475/4332 cut-off events. [2024-06-03 18:37:30,073 INFO L125 PetriNetUnfolderBase]: For 105250/105267 co-relation queries the response was YES. [2024-06-03 18:37:30,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 4332 events. 2475/4332 cut-off events. For 105250/105267 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29405 event pairs, 851 based on Foata normal form. 48/4376 useless extension candidates. Maximal degree in co-relation 23352. Up to 2675 conditions per place. [2024-06-03 18:37:30,108 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-03 18:37:30,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 190 transitions, 2438 flow [2024-06-03 18:37:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 18:37:30,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-03 18:37:30,109 INFO L175 Difference]: Start difference. First operand has 138 places, 148 transitions, 1760 flow. Second operand 7 states and 179 transitions. [2024-06-03 18:37:30,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 190 transitions, 2438 flow [2024-06-03 18:37:30,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2318 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:30,230 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1824 flow [2024-06-03 18:37:30,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1824, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-06-03 18:37:30,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-03 18:37:30,231 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1824 flow [2024-06-03 18:37:30,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:30,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:30,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:30,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:37:30,231 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:30,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2102032412, now seen corresponding path program 1 times [2024-06-03 18:37:30,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:30,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613036658] [2024-06-03 18:37:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:30,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613036658] [2024-06-03 18:37:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613036658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:30,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213098563] [2024-06-03 18:37:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:30,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:30,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1824 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:30,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:30,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:30,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:30,943 INFO L124 PetriNetUnfolderBase]: 2584/4521 cut-off events. [2024-06-03 18:37:30,944 INFO L125 PetriNetUnfolderBase]: For 114412/114429 co-relation queries the response was YES. [2024-06-03 18:37:30,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24406 conditions, 4521 events. 2584/4521 cut-off events. For 114412/114429 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31060 event pairs, 908 based on Foata normal form. 48/4563 useless extension candidates. Maximal degree in co-relation 24335. Up to 3238 conditions per place. [2024-06-03 18:37:30,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 55 changer transitions 5/195 dead transitions. [2024-06-03 18:37:30,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2452 flow [2024-06-03 18:37:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 18:37:30,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-03 18:37:30,976 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1824 flow. Second operand 9 states and 217 transitions. [2024-06-03 18:37:30,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2452 flow [2024-06-03 18:37:31,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 195 transitions, 2311 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:31,129 INFO L231 Difference]: Finished difference. Result has 145 places, 149 transitions, 1817 flow [2024-06-03 18:37:31,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1817, PETRI_PLACES=145, PETRI_TRANSITIONS=149} [2024-06-03 18:37:31,130 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-03 18:37:31,130 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 149 transitions, 1817 flow [2024-06-03 18:37:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:31,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:37:31,131 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:31,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash 73521636, now seen corresponding path program 2 times [2024-06-03 18:37:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:31,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362262261] [2024-06-03 18:37:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:31,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362262261] [2024-06-03 18:37:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362262261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:31,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224934440] [2024-06-03 18:37:31,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:31,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:31,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 149 transitions, 1817 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:31,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:31,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:31,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:31,708 INFO L124 PetriNetUnfolderBase]: 2407/4220 cut-off events. [2024-06-03 18:37:31,708 INFO L125 PetriNetUnfolderBase]: For 101398/101398 co-relation queries the response was YES. [2024-06-03 18:37:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 4220 events. 2407/4220 cut-off events. For 101398/101398 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28467 event pairs, 992 based on Foata normal form. 1/4217 useless extension candidates. Maximal degree in co-relation 23107. Up to 3849 conditions per place. [2024-06-03 18:37:31,739 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2024-06-03 18:37:31,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 2152 flow [2024-06-03 18:37:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-03 18:37:31,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-03 18:37:31,740 INFO L175 Difference]: Start difference. First operand has 145 places, 149 transitions, 1817 flow. Second operand 5 states and 112 transitions. [2024-06-03 18:37:31,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 2152 flow [2024-06-03 18:37:31,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 159 transitions, 2004 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:31,874 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1711 flow [2024-06-03 18:37:31,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1711, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-06-03 18:37:31,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-03 18:37:31,875 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1711 flow [2024-06-03 18:37:31,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:31,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:31,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:37:31,876 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:31,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1880735352, now seen corresponding path program 7 times [2024-06-03 18:37:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:31,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607961042] [2024-06-03 18:37:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:31,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:31,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607961042] [2024-06-03 18:37:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607961042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:31,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045180276] [2024-06-03 18:37:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:32,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:32,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1711 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:32,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:32,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:32,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:32,680 INFO L124 PetriNetUnfolderBase]: 2516/4402 cut-off events. [2024-06-03 18:37:32,681 INFO L125 PetriNetUnfolderBase]: For 125496/125513 co-relation queries the response was YES. [2024-06-03 18:37:32,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23653 conditions, 4402 events. 2516/4402 cut-off events. For 125496/125513 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29967 event pairs, 1035 based on Foata normal form. 54/4444 useless extension candidates. Maximal degree in co-relation 23580. Up to 3637 conditions per place. [2024-06-03 18:37:32,720 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 68 changer transitions 3/195 dead transitions. [2024-06-03 18:37:32,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 195 transitions, 2517 flow [2024-06-03 18:37:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 18:37:32,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-03 18:37:32,722 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1711 flow. Second operand 9 states and 218 transitions. [2024-06-03 18:37:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 195 transitions, 2517 flow [2024-06-03 18:37:32,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 195 transitions, 2481 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:32,905 INFO L231 Difference]: Finished difference. Result has 148 places, 149 transitions, 1859 flow [2024-06-03 18:37:32,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1859, PETRI_PLACES=148, PETRI_TRANSITIONS=149} [2024-06-03 18:37:32,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-03 18:37:32,907 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 149 transitions, 1859 flow [2024-06-03 18:37:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:32,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:32,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:37:32,908 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:32,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1894273666, now seen corresponding path program 2 times [2024-06-03 18:37:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270649760] [2024-06-03 18:37:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:33,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270649760] [2024-06-03 18:37:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270649760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:33,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777905860] [2024-06-03 18:37:33,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:33,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:33,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:33,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 149 transitions, 1859 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:33,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:33,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:33,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:33,703 INFO L124 PetriNetUnfolderBase]: 2615/4601 cut-off events. [2024-06-03 18:37:33,704 INFO L125 PetriNetUnfolderBase]: For 133684/133701 co-relation queries the response was YES. [2024-06-03 18:37:33,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24926 conditions, 4601 events. 2615/4601 cut-off events. For 133684/133701 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31756 event pairs, 1035 based on Foata normal form. 48/4637 useless extension candidates. Maximal degree in co-relation 24852. Up to 3573 conditions per place. [2024-06-03 18:37:33,743 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 123 selfloop transitions, 70 changer transitions 6/205 dead transitions. [2024-06-03 18:37:33,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 2741 flow [2024-06-03 18:37:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:37:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:37:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-03 18:37:33,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-03 18:37:33,744 INFO L175 Difference]: Start difference. First operand has 148 places, 149 transitions, 1859 flow. Second operand 10 states and 242 transitions. [2024-06-03 18:37:33,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 2741 flow [2024-06-03 18:37:33,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 205 transitions, 2570 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:33,909 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1873 flow [2024-06-03 18:37:33,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-06-03 18:37:33,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-03 18:37:33,909 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1873 flow [2024-06-03 18:37:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:33,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:33,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:33,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:37:33,910 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:33,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1628576386, now seen corresponding path program 3 times [2024-06-03 18:37:33,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:33,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892155808] [2024-06-03 18:37:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:33,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:34,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892155808] [2024-06-03 18:37:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892155808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:34,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:34,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668203077] [2024-06-03 18:37:34,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:34,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:34,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:34,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:34,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1873 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:34,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:34,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:34,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:34,588 INFO L124 PetriNetUnfolderBase]: 2760/4832 cut-off events. [2024-06-03 18:37:34,588 INFO L125 PetriNetUnfolderBase]: For 147546/147563 co-relation queries the response was YES. [2024-06-03 18:37:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26043 conditions, 4832 events. 2760/4832 cut-off events. For 147546/147563 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33618 event pairs, 1002 based on Foata normal form. 48/4864 useless extension candidates. Maximal degree in co-relation 25968. Up to 2795 conditions per place. [2024-06-03 18:37:34,623 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 75 changer transitions 8/204 dead transitions. [2024-06-03 18:37:34,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 2739 flow [2024-06-03 18:37:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-03 18:37:34,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 18:37:34,625 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1873 flow. Second operand 9 states and 225 transitions. [2024-06-03 18:37:34,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 2739 flow [2024-06-03 18:37:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 204 transitions, 2561 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:34,827 INFO L231 Difference]: Finished difference. Result has 151 places, 146 transitions, 1757 flow [2024-06-03 18:37:34,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=151, PETRI_TRANSITIONS=146} [2024-06-03 18:37:34,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-03 18:37:34,828 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 146 transitions, 1757 flow [2024-06-03 18:37:34,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:34,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:34,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:37:34,828 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:34,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1792060004, now seen corresponding path program 3 times [2024-06-03 18:37:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182157481] [2024-06-03 18:37:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182157481] [2024-06-03 18:37:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182157481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:34,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:34,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513093062] [2024-06-03 18:37:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:34,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:34,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:34,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 1757 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:34,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:34,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:34,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:35,416 INFO L124 PetriNetUnfolderBase]: 2484/4368 cut-off events. [2024-06-03 18:37:35,416 INFO L125 PetriNetUnfolderBase]: For 132422/132422 co-relation queries the response was YES. [2024-06-03 18:37:35,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24357 conditions, 4368 events. 2484/4368 cut-off events. For 132422/132422 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29881 event pairs, 1053 based on Foata normal form. 1/4365 useless extension candidates. Maximal degree in co-relation 24281. Up to 3987 conditions per place. [2024-06-03 18:37:35,446 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 133 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-03 18:37:35,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 162 transitions, 2157 flow [2024-06-03 18:37:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-03 18:37:35,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 18:37:35,447 INFO L175 Difference]: Start difference. First operand has 151 places, 146 transitions, 1757 flow. Second operand 6 states and 128 transitions. [2024-06-03 18:37:35,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 162 transitions, 2157 flow [2024-06-03 18:37:35,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 162 transitions, 1922 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:35,587 INFO L231 Difference]: Finished difference. Result has 150 places, 151 transitions, 1645 flow [2024-06-03 18:37:35,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1645, PETRI_PLACES=150, PETRI_TRANSITIONS=151} [2024-06-03 18:37:35,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-03 18:37:35,588 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 151 transitions, 1645 flow [2024-06-03 18:37:35,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:35,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:35,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:35,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:37:35,588 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:35,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2015783543, now seen corresponding path program 1 times [2024-06-03 18:37:35,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:35,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140394931] [2024-06-03 18:37:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:35,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:35,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:35,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140394931] [2024-06-03 18:37:35,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140394931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:35,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:35,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796788843] [2024-06-03 18:37:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:35,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:35,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 151 transitions, 1645 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:35,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:35,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:35,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:36,171 INFO L124 PetriNetUnfolderBase]: 2333/4144 cut-off events. [2024-06-03 18:37:36,172 INFO L125 PetriNetUnfolderBase]: For 126279/126288 co-relation queries the response was YES. [2024-06-03 18:37:36,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22203 conditions, 4144 events. 2333/4144 cut-off events. For 126279/126288 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28414 event pairs, 926 based on Foata normal form. 17/4137 useless extension candidates. Maximal degree in co-relation 22126. Up to 3620 conditions per place. [2024-06-03 18:37:36,207 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-03 18:37:36,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 170 transitions, 2043 flow [2024-06-03 18:37:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 18:37:36,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-03 18:37:36,208 INFO L175 Difference]: Start difference. First operand has 150 places, 151 transitions, 1645 flow. Second operand 6 states and 139 transitions. [2024-06-03 18:37:36,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 170 transitions, 2043 flow [2024-06-03 18:37:36,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 170 transitions, 1979 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:36,385 INFO L231 Difference]: Finished difference. Result has 153 places, 153 transitions, 1689 flow [2024-06-03 18:37:36,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1689, PETRI_PLACES=153, PETRI_TRANSITIONS=153} [2024-06-03 18:37:36,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-03 18:37:36,386 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 153 transitions, 1689 flow [2024-06-03 18:37:36,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:36,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:36,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:36,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:37:36,386 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:36,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash -120741913, now seen corresponding path program 2 times [2024-06-03 18:37:36,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:36,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922526319] [2024-06-03 18:37:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:36,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:36,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922526319] [2024-06-03 18:37:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922526319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:36,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426687030] [2024-06-03 18:37:36,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:36,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:36,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:36,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 153 transitions, 1689 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:36,950 INFO L124 PetriNetUnfolderBase]: 2373/4201 cut-off events. [2024-06-03 18:37:36,951 INFO L125 PetriNetUnfolderBase]: For 133885/133894 co-relation queries the response was YES. [2024-06-03 18:37:36,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22915 conditions, 4201 events. 2373/4201 cut-off events. For 133885/133894 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28727 event pairs, 978 based on Foata normal form. 17/4190 useless extension candidates. Maximal degree in co-relation 22837. Up to 3702 conditions per place. [2024-06-03 18:37:36,983 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-03 18:37:36,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 2229 flow [2024-06-03 18:37:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 18:37:36,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-03 18:37:36,984 INFO L175 Difference]: Start difference. First operand has 153 places, 153 transitions, 1689 flow. Second operand 6 states and 139 transitions. [2024-06-03 18:37:36,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 2229 flow [2024-06-03 18:37:37,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 171 transitions, 2157 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:37,220 INFO L231 Difference]: Finished difference. Result has 155 places, 155 transitions, 1744 flow [2024-06-03 18:37:37,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1744, PETRI_PLACES=155, PETRI_TRANSITIONS=155} [2024-06-03 18:37:37,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-03 18:37:37,221 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 155 transitions, 1744 flow [2024-06-03 18:37:37,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:37,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:37,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:37,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:37:37,222 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:37,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash -107409433, now seen corresponding path program 3 times [2024-06-03 18:37:37,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:37,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228077354] [2024-06-03 18:37:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:37,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228077354] [2024-06-03 18:37:37,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228077354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:37,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:37,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944411878] [2024-06-03 18:37:37,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:37,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:37,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:37,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 18:37:37,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 155 transitions, 1744 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:37,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:37,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 18:37:37,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:37,822 INFO L124 PetriNetUnfolderBase]: 2438/4302 cut-off events. [2024-06-03 18:37:37,823 INFO L125 PetriNetUnfolderBase]: For 144514/144523 co-relation queries the response was YES. [2024-06-03 18:37:37,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23733 conditions, 4302 events. 2438/4302 cut-off events. For 144514/144523 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29574 event pairs, 944 based on Foata normal form. 17/4291 useless extension candidates. Maximal degree in co-relation 23654. Up to 3605 conditions per place. [2024-06-03 18:37:37,855 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 44 changer transitions 0/179 dead transitions. [2024-06-03 18:37:37,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 179 transitions, 2422 flow [2024-06-03 18:37:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:37:37,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:37,872 INFO L175 Difference]: Start difference. First operand has 155 places, 155 transitions, 1744 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:37:37,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 179 transitions, 2422 flow [2024-06-03 18:37:38,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 179 transitions, 2319 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:38,060 INFO L231 Difference]: Finished difference. Result has 157 places, 158 transitions, 1796 flow [2024-06-03 18:37:38,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1796, PETRI_PLACES=157, PETRI_TRANSITIONS=158} [2024-06-03 18:37:38,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-03 18:37:38,061 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 158 transitions, 1796 flow [2024-06-03 18:37:38,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:38,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:38,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:38,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:37:38,062 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:38,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:38,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1639393537, now seen corresponding path program 1 times [2024-06-03 18:37:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:38,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081771535] [2024-06-03 18:37:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:38,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081771535] [2024-06-03 18:37:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081771535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:38,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:38,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810957981] [2024-06-03 18:37:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:38,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:38,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:38,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 158 transitions, 1796 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:38,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:38,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:38,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:38,697 INFO L124 PetriNetUnfolderBase]: 2529/4436 cut-off events. [2024-06-03 18:37:38,699 INFO L125 PetriNetUnfolderBase]: For 148775/148786 co-relation queries the response was YES. [2024-06-03 18:37:38,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24623 conditions, 4436 events. 2529/4436 cut-off events. For 148775/148786 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30189 event pairs, 912 based on Foata normal form. 14/4448 useless extension candidates. Maximal degree in co-relation 24543. Up to 3948 conditions per place. [2024-06-03 18:37:38,738 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 160 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-03 18:37:38,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 189 transitions, 2344 flow [2024-06-03 18:37:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 18:37:38,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-03 18:37:38,740 INFO L175 Difference]: Start difference. First operand has 157 places, 158 transitions, 1796 flow. Second operand 8 states and 174 transitions. [2024-06-03 18:37:38,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 189 transitions, 2344 flow [2024-06-03 18:37:38,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 189 transitions, 2265 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:38,993 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1776 flow [2024-06-03 18:37:38,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1776, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2024-06-03 18:37:38,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-03 18:37:38,994 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1776 flow [2024-06-03 18:37:38,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:38,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:38,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:38,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:37:38,994 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:38,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964417, now seen corresponding path program 2 times [2024-06-03 18:37:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:38,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22733753] [2024-06-03 18:37:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:39,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:39,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22733753] [2024-06-03 18:37:39,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22733753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:39,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607727895] [2024-06-03 18:37:39,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:39,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:39,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:39,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:39,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1776 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:39,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:39,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:39,771 INFO L124 PetriNetUnfolderBase]: 2557/4480 cut-off events. [2024-06-03 18:37:39,771 INFO L125 PetriNetUnfolderBase]: For 156819/156830 co-relation queries the response was YES. [2024-06-03 18:37:39,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 4480 events. 2557/4480 cut-off events. For 156819/156830 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30622 event pairs, 1006 based on Foata normal form. 16/4494 useless extension candidates. Maximal degree in co-relation 24825. Up to 4068 conditions per place. [2024-06-03 18:37:39,812 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 157 selfloop transitions, 20 changer transitions 0/183 dead transitions. [2024-06-03 18:37:39,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 183 transitions, 2216 flow [2024-06-03 18:37:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 18:37:39,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 18:37:39,814 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1776 flow. Second operand 8 states and 168 transitions. [2024-06-03 18:37:39,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 183 transitions, 2216 flow [2024-06-03 18:37:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 2177 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:40,022 INFO L231 Difference]: Finished difference. Result has 166 places, 160 transitions, 1795 flow [2024-06-03 18:37:40,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1795, PETRI_PLACES=166, PETRI_TRANSITIONS=160} [2024-06-03 18:37:40,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-03 18:37:40,023 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 1795 flow [2024-06-03 18:37:40,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:40,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:40,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:37:40,024 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:40,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1642253473, now seen corresponding path program 1 times [2024-06-03 18:37:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686665535] [2024-06-03 18:37:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686665535] [2024-06-03 18:37:40,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686665535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:40,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:40,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19606906] [2024-06-03 18:37:40,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:40,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:40,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 160 transitions, 1795 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:40,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:40,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:40,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:40,790 INFO L124 PetriNetUnfolderBase]: 2559/4485 cut-off events. [2024-06-03 18:37:40,790 INFO L125 PetriNetUnfolderBase]: For 158967/158984 co-relation queries the response was YES. [2024-06-03 18:37:40,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25072 conditions, 4485 events. 2559/4485 cut-off events. For 158967/158984 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30645 event pairs, 1017 based on Foata normal form. 14/4495 useless extension candidates. Maximal degree in co-relation 24989. Up to 3965 conditions per place. [2024-06-03 18:37:40,828 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 55 changer transitions 1/196 dead transitions. [2024-06-03 18:37:40,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 196 transitions, 2439 flow [2024-06-03 18:37:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-03 18:37:40,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 18:37:40,830 INFO L175 Difference]: Start difference. First operand has 166 places, 160 transitions, 1795 flow. Second operand 9 states and 207 transitions. [2024-06-03 18:37:40,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 196 transitions, 2439 flow [2024-06-03 18:37:41,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 196 transitions, 2400 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:41,055 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 1893 flow [2024-06-03 18:37:41,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1893, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2024-06-03 18:37:41,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-03 18:37:41,056 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 1893 flow [2024-06-03 18:37:41,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:41,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:41,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:37:41,057 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:41,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1647967393, now seen corresponding path program 2 times [2024-06-03 18:37:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508633844] [2024-06-03 18:37:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508633844] [2024-06-03 18:37:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508633844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:41,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:41,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260663552] [2024-06-03 18:37:41,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:41,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:41,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 1893 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:41,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:41,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:41,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:41,728 INFO L124 PetriNetUnfolderBase]: 2578/4516 cut-off events. [2024-06-03 18:37:41,729 INFO L125 PetriNetUnfolderBase]: For 168031/168048 co-relation queries the response was YES. [2024-06-03 18:37:41,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25699 conditions, 4516 events. 2578/4516 cut-off events. For 168031/168048 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30846 event pairs, 1017 based on Foata normal form. 13/4525 useless extension candidates. Maximal degree in co-relation 25615. Up to 3984 conditions per place. [2024-06-03 18:37:41,768 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 61 changer transitions 1/195 dead transitions. [2024-06-03 18:37:41,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 195 transitions, 2593 flow [2024-06-03 18:37:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 18:37:41,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-03 18:37:41,769 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 1893 flow. Second operand 8 states and 183 transitions. [2024-06-03 18:37:41,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 195 transitions, 2593 flow [2024-06-03 18:37:42,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 195 transitions, 2487 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:42,100 INFO L231 Difference]: Finished difference. Result has 172 places, 168 transitions, 2022 flow [2024-06-03 18:37:42,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=172, PETRI_TRANSITIONS=168} [2024-06-03 18:37:42,101 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-03 18:37:42,101 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 168 transitions, 2022 flow [2024-06-03 18:37:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:42,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:42,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:42,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:37:42,101 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:42,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1934851747, now seen corresponding path program 3 times [2024-06-03 18:37:42,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:42,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86703916] [2024-06-03 18:37:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:42,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86703916] [2024-06-03 18:37:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86703916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:42,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:42,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199433842] [2024-06-03 18:37:42,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:42,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:42,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:42,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 168 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:42,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:42,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:42,740 INFO L124 PetriNetUnfolderBase]: 2558/4483 cut-off events. [2024-06-03 18:37:42,740 INFO L125 PetriNetUnfolderBase]: For 174896/174896 co-relation queries the response was YES. [2024-06-03 18:37:42,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25489 conditions, 4483 events. 2558/4483 cut-off events. For 174896/174896 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30543 event pairs, 1005 based on Foata normal form. 8/4487 useless extension candidates. Maximal degree in co-relation 25403. Up to 4070 conditions per place. [2024-06-03 18:37:42,780 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 158 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-03 18:37:42,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2431 flow [2024-06-03 18:37:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:37:42,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 18:37:42,782 INFO L175 Difference]: Start difference. First operand has 172 places, 168 transitions, 2022 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:37:42,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2431 flow [2024-06-03 18:37:43,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 183 transitions, 2346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:43,034 INFO L231 Difference]: Finished difference. Result has 174 places, 168 transitions, 1980 flow [2024-06-03 18:37:43,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1980, PETRI_PLACES=174, PETRI_TRANSITIONS=168} [2024-06-03 18:37:43,034 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-03 18:37:43,035 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 168 transitions, 1980 flow [2024-06-03 18:37:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:43,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:43,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:43,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:37:43,035 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:43,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1757544643, now seen corresponding path program 3 times [2024-06-03 18:37:43,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:43,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975834778] [2024-06-03 18:37:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:43,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:43,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975834778] [2024-06-03 18:37:43,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975834778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:43,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:43,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:43,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634775323] [2024-06-03 18:37:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:43,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:43,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:43,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 168 transitions, 1980 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:43,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:43,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:43,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:43,680 INFO L124 PetriNetUnfolderBase]: 2552/4480 cut-off events. [2024-06-03 18:37:43,680 INFO L125 PetriNetUnfolderBase]: For 175252/175269 co-relation queries the response was YES. [2024-06-03 18:37:43,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25409 conditions, 4480 events. 2552/4480 cut-off events. For 175252/175269 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30609 event pairs, 1009 based on Foata normal form. 14/4490 useless extension candidates. Maximal degree in co-relation 25322. Up to 3988 conditions per place. [2024-06-03 18:37:43,716 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 47 changer transitions 1/188 dead transitions. [2024-06-03 18:37:43,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 2478 flow [2024-06-03 18:37:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:37:43,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:37:43,718 INFO L175 Difference]: Start difference. First operand has 174 places, 168 transitions, 1980 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:37:43,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 2478 flow [2024-06-03 18:37:43,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 188 transitions, 2426 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:43,995 INFO L231 Difference]: Finished difference. Result has 175 places, 167 transitions, 2022 flow [2024-06-03 18:37:43,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2022, PETRI_PLACES=175, PETRI_TRANSITIONS=167} [2024-06-03 18:37:43,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-03 18:37:43,996 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 167 transitions, 2022 flow [2024-06-03 18:37:43,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:43,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:43,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:43,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:37:43,996 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:43,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1786291941, now seen corresponding path program 4 times [2024-06-03 18:37:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:43,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119577534] [2024-06-03 18:37:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:44,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119577534] [2024-06-03 18:37:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119577534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:44,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951225577] [2024-06-03 18:37:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:44,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:44,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:44,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:44,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 167 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:44,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:44,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:44,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:44,741 INFO L124 PetriNetUnfolderBase]: 2517/4415 cut-off events. [2024-06-03 18:37:44,741 INFO L125 PetriNetUnfolderBase]: For 180913/180930 co-relation queries the response was YES. [2024-06-03 18:37:44,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25262 conditions, 4415 events. 2517/4415 cut-off events. For 180913/180930 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30017 event pairs, 991 based on Foata normal form. 14/4425 useless extension candidates. Maximal degree in co-relation 25174. Up to 3929 conditions per place. [2024-06-03 18:37:44,773 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 48 changer transitions 2/188 dead transitions. [2024-06-03 18:37:44,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 188 transitions, 2438 flow [2024-06-03 18:37:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-03 18:37:44,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-03 18:37:44,774 INFO L175 Difference]: Start difference. First operand has 175 places, 167 transitions, 2022 flow. Second operand 8 states and 178 transitions. [2024-06-03 18:37:44,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 188 transitions, 2438 flow [2024-06-03 18:37:45,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 188 transitions, 2352 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:45,054 INFO L231 Difference]: Finished difference. Result has 178 places, 165 transitions, 2013 flow [2024-06-03 18:37:45,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2013, PETRI_PLACES=178, PETRI_TRANSITIONS=165} [2024-06-03 18:37:45,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-03 18:37:45,055 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 165 transitions, 2013 flow [2024-06-03 18:37:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:45,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:45,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:45,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:37:45,056 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:45,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1934854723, now seen corresponding path program 5 times [2024-06-03 18:37:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293739138] [2024-06-03 18:37:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:45,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293739138] [2024-06-03 18:37:45,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293739138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:45,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:45,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777274433] [2024-06-03 18:37:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:45,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:45,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 165 transitions, 2013 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:45,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:45,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:45,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:45,651 INFO L124 PetriNetUnfolderBase]: 2404/4215 cut-off events. [2024-06-03 18:37:45,651 INFO L125 PetriNetUnfolderBase]: For 178780/178786 co-relation queries the response was YES. [2024-06-03 18:37:45,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24486 conditions, 4215 events. 2404/4215 cut-off events. For 178780/178786 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28408 event pairs, 952 based on Foata normal form. 5/4213 useless extension candidates. Maximal degree in co-relation 24398. Up to 3704 conditions per place. [2024-06-03 18:37:45,685 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 57 changer transitions 2/179 dead transitions. [2024-06-03 18:37:45,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 2393 flow [2024-06-03 18:37:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 18:37:45,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 18:37:45,686 INFO L175 Difference]: Start difference. First operand has 178 places, 165 transitions, 2013 flow. Second operand 7 states and 154 transitions. [2024-06-03 18:37:45,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 2393 flow [2024-06-03 18:37:45,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 179 transitions, 2212 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 18:37:45,980 INFO L231 Difference]: Finished difference. Result has 174 places, 163 transitions, 1929 flow [2024-06-03 18:37:45,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=174, PETRI_TRANSITIONS=163} [2024-06-03 18:37:45,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-03 18:37:45,980 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 163 transitions, 1929 flow [2024-06-03 18:37:45,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:45,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:45,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:45,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 18:37:45,984 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1935220709, now seen corresponding path program 1 times [2024-06-03 18:37:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:45,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312165415] [2024-06-03 18:37:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:45,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:46,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312165415] [2024-06-03 18:37:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312165415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:46,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:46,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491520070] [2024-06-03 18:37:46,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:46,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:46,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:46,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:46,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 163 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:46,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:46,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:46,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:46,560 INFO L124 PetriNetUnfolderBase]: 2341/4105 cut-off events. [2024-06-03 18:37:46,560 INFO L125 PetriNetUnfolderBase]: For 182459/182459 co-relation queries the response was YES. [2024-06-03 18:37:46,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24071 conditions, 4105 events. 2341/4105 cut-off events. For 182459/182459 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27508 event pairs, 879 based on Foata normal form. 6/4107 useless extension candidates. Maximal degree in co-relation 23984. Up to 3630 conditions per place. [2024-06-03 18:37:46,595 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 156 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-03 18:37:46,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 2407 flow [2024-06-03 18:37:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:37:46,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-03 18:37:46,596 INFO L175 Difference]: Start difference. First operand has 174 places, 163 transitions, 1929 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:37:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 2407 flow [2024-06-03 18:37:46,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 185 transitions, 2254 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:46,910 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 1894 flow [2024-06-03 18:37:46,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1894, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-06-03 18:37:46,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-03 18:37:46,910 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 1894 flow [2024-06-03 18:37:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:46,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:46,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 18:37:46,911 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:46,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash 551600133, now seen corresponding path program 4 times [2024-06-03 18:37:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:46,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109767373] [2024-06-03 18:37:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:46,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109767373] [2024-06-03 18:37:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109767373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:47,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:47,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525865404] [2024-06-03 18:37:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:47,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:47,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 1894 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:47,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:47,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:47,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:47,551 INFO L124 PetriNetUnfolderBase]: 2356/4134 cut-off events. [2024-06-03 18:37:47,552 INFO L125 PetriNetUnfolderBase]: For 190748/190748 co-relation queries the response was YES. [2024-06-03 18:37:47,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24326 conditions, 4134 events. 2356/4134 cut-off events. For 190748/190748 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27726 event pairs, 904 based on Foata normal form. 8/4138 useless extension candidates. Maximal degree in co-relation 24237. Up to 3717 conditions per place. [2024-06-03 18:37:47,579 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 154 selfloop transitions, 24 changer transitions 0/184 dead transitions. [2024-06-03 18:37:47,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 184 transitions, 2325 flow [2024-06-03 18:37:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 18:37:47,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 18:37:47,581 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 1894 flow. Second operand 7 states and 147 transitions. [2024-06-03 18:37:47,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 184 transitions, 2325 flow [2024-06-03 18:37:47,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 184 transitions, 2268 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:47,902 INFO L231 Difference]: Finished difference. Result has 177 places, 168 transitions, 1910 flow [2024-06-03 18:37:47,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1910, PETRI_PLACES=177, PETRI_TRANSITIONS=168} [2024-06-03 18:37:47,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-03 18:37:47,903 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 168 transitions, 1910 flow [2024-06-03 18:37:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:47,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:47,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:47,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 18:37:47,904 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:47,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1332600505, now seen corresponding path program 1 times [2024-06-03 18:37:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666578118] [2024-06-03 18:37:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666578118] [2024-06-03 18:37:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666578118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:47,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:47,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:47,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106994320] [2024-06-03 18:37:47,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:47,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:47,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:48,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:48,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 168 transitions, 1910 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:48,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:48,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:48,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:48,477 INFO L124 PetriNetUnfolderBase]: 2353/4131 cut-off events. [2024-06-03 18:37:48,478 INFO L125 PetriNetUnfolderBase]: For 190163/190180 co-relation queries the response was YES. [2024-06-03 18:37:48,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24339 conditions, 4131 events. 2353/4131 cut-off events. For 190163/190180 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27782 event pairs, 908 based on Foata normal form. 13/4135 useless extension candidates. Maximal degree in co-relation 24249. Up to 3688 conditions per place. [2024-06-03 18:37:48,512 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 145 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-03 18:37:48,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 185 transitions, 2400 flow [2024-06-03 18:37:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:37:48,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-03 18:37:48,514 INFO L175 Difference]: Start difference. First operand has 177 places, 168 transitions, 1910 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:37:48,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 185 transitions, 2400 flow [2024-06-03 18:37:48,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 185 transitions, 2335 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:48,827 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 1919 flow [2024-06-03 18:37:48,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1919, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2024-06-03 18:37:48,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-03 18:37:48,832 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 1919 flow [2024-06-03 18:37:48,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:48,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:48,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:48,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 18:37:48,832 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:48,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1798518301, now seen corresponding path program 2 times [2024-06-03 18:37:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207376101] [2024-06-03 18:37:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:48,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207376101] [2024-06-03 18:37:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207376101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:48,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:48,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090743460] [2024-06-03 18:37:48,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:48,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 1919 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:48,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:48,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:49,416 INFO L124 PetriNetUnfolderBase]: 2350/4130 cut-off events. [2024-06-03 18:37:49,417 INFO L125 PetriNetUnfolderBase]: For 196386/196397 co-relation queries the response was YES. [2024-06-03 18:37:49,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24361 conditions, 4130 events. 2350/4130 cut-off events. For 196386/196397 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27765 event pairs, 918 based on Foata normal form. 9/4133 useless extension candidates. Maximal degree in co-relation 24270. Up to 3685 conditions per place. [2024-06-03 18:37:49,450 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 37 changer transitions 0/178 dead transitions. [2024-06-03 18:37:49,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 178 transitions, 2287 flow [2024-06-03 18:37:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-03 18:37:49,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-06-03 18:37:49,458 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 1919 flow. Second operand 6 states and 131 transitions. [2024-06-03 18:37:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 178 transitions, 2287 flow [2024-06-03 18:37:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 2191 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:49,896 INFO L231 Difference]: Finished difference. Result has 179 places, 168 transitions, 1903 flow [2024-06-03 18:37:49,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1903, PETRI_PLACES=179, PETRI_TRANSITIONS=168} [2024-06-03 18:37:49,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-03 18:37:49,897 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 168 transitions, 1903 flow [2024-06-03 18:37:49,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:49,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:49,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:49,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 18:37:49,897 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:49,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1291642587, now seen corresponding path program 6 times [2024-06-03 18:37:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631708585] [2024-06-03 18:37:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:50,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:50,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631708585] [2024-06-03 18:37:50,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631708585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:50,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:50,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:50,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140312262] [2024-06-03 18:37:50,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:50,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:50,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:50,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 168 transitions, 1903 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:50,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:50,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:50,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:50,577 INFO L124 PetriNetUnfolderBase]: 2352/4134 cut-off events. [2024-06-03 18:37:50,577 INFO L125 PetriNetUnfolderBase]: For 204158/204169 co-relation queries the response was YES. [2024-06-03 18:37:50,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24485 conditions, 4134 events. 2352/4134 cut-off events. For 204158/204169 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27792 event pairs, 917 based on Foata normal form. 10/4138 useless extension candidates. Maximal degree in co-relation 24393. Up to 3596 conditions per place. [2024-06-03 18:37:50,610 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 76 changer transitions 0/191 dead transitions. [2024-06-03 18:37:50,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 191 transitions, 2538 flow [2024-06-03 18:37:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 18:37:50,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:37:50,612 INFO L175 Difference]: Start difference. First operand has 179 places, 168 transitions, 1903 flow. Second operand 8 states and 180 transitions. [2024-06-03 18:37:50,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 191 transitions, 2538 flow [2024-06-03 18:37:50,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 191 transitions, 2429 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:50,999 INFO L231 Difference]: Finished difference. Result has 181 places, 171 transitions, 1986 flow [2024-06-03 18:37:50,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=181, PETRI_TRANSITIONS=171} [2024-06-03 18:37:51,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 18:37:51,000 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 171 transitions, 1986 flow [2024-06-03 18:37:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:51,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:51,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:51,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 18:37:51,000 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:51,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash 551603109, now seen corresponding path program 7 times [2024-06-03 18:37:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409051858] [2024-06-03 18:37:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409051858] [2024-06-03 18:37:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409051858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:51,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:51,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:51,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5623693] [2024-06-03 18:37:51,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:51,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:51,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:51,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:51,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 171 transitions, 1986 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:51,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:51,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:51,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:51,637 INFO L124 PetriNetUnfolderBase]: 2349/4127 cut-off events. [2024-06-03 18:37:51,637 INFO L125 PetriNetUnfolderBase]: For 210442/210442 co-relation queries the response was YES. [2024-06-03 18:37:51,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24638 conditions, 4127 events. 2349/4127 cut-off events. For 210442/210442 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27764 event pairs, 949 based on Foata normal form. 1/4119 useless extension candidates. Maximal degree in co-relation 24546. Up to 3555 conditions per place. [2024-06-03 18:37:51,677 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 83 changer transitions 0/190 dead transitions. [2024-06-03 18:37:51,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 190 transitions, 2654 flow [2024-06-03 18:37:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:37:51,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 18:37:51,678 INFO L175 Difference]: Start difference. First operand has 181 places, 171 transitions, 1986 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:37:51,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 190 transitions, 2654 flow [2024-06-03 18:37:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 190 transitions, 2458 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:52,171 INFO L231 Difference]: Finished difference. Result has 182 places, 177 transitions, 2088 flow [2024-06-03 18:37:52,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2088, PETRI_PLACES=182, PETRI_TRANSITIONS=177} [2024-06-03 18:37:52,172 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-03 18:37:52,172 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 177 transitions, 2088 flow [2024-06-03 18:37:52,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:52,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:52,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:52,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 18:37:52,173 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:52,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash 551969095, now seen corresponding path program 2 times [2024-06-03 18:37:52,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:52,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464463938] [2024-06-03 18:37:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:52,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:52,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464463938] [2024-06-03 18:37:52,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464463938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:52,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:52,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:52,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884551542] [2024-06-03 18:37:52,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:52,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:52,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 177 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:52,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:52,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:52,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:52,754 INFO L124 PetriNetUnfolderBase]: 2369/4163 cut-off events. [2024-06-03 18:37:52,755 INFO L125 PetriNetUnfolderBase]: For 227827/227827 co-relation queries the response was YES. [2024-06-03 18:37:52,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25802 conditions, 4163 events. 2369/4163 cut-off events. For 227827/227827 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27967 event pairs, 897 based on Foata normal form. 6/4165 useless extension candidates. Maximal degree in co-relation 25709. Up to 3710 conditions per place. [2024-06-03 18:37:52,789 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 26 changer transitions 0/199 dead transitions. [2024-06-03 18:37:52,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 199 transitions, 2595 flow [2024-06-03 18:37:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:37:52,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 18:37:52,790 INFO L175 Difference]: Start difference. First operand has 182 places, 177 transitions, 2088 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:37:52,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 199 transitions, 2595 flow [2024-06-03 18:37:53,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 199 transitions, 2492 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:53,206 INFO L231 Difference]: Finished difference. Result has 187 places, 180 transitions, 2095 flow [2024-06-03 18:37:53,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2095, PETRI_PLACES=187, PETRI_TRANSITIONS=180} [2024-06-03 18:37:53,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-03 18:37:53,207 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 180 transitions, 2095 flow [2024-06-03 18:37:53,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:53,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:53,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:53,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 18:37:53,208 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:53,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2116957477, now seen corresponding path program 3 times [2024-06-03 18:37:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:53,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864555280] [2024-06-03 18:37:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:53,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:53,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864555280] [2024-06-03 18:37:53,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864555280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:53,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:53,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:53,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316137916] [2024-06-03 18:37:53,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:53,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:53,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:53,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:53,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 180 transitions, 2095 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:53,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:53,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:53,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:53,768 INFO L124 PetriNetUnfolderBase]: 2356/4144 cut-off events. [2024-06-03 18:37:53,768 INFO L125 PetriNetUnfolderBase]: For 229273/229273 co-relation queries the response was YES. [2024-06-03 18:37:53,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25666 conditions, 4144 events. 2356/4144 cut-off events. For 229273/229273 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27887 event pairs, 876 based on Foata normal form. 6/4146 useless extension candidates. Maximal degree in co-relation 25569. Up to 3559 conditions per place. [2024-06-03 18:37:53,804 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 164 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-03 18:37:53,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 202 transitions, 2593 flow [2024-06-03 18:37:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:37:53,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 18:37:53,806 INFO L175 Difference]: Start difference. First operand has 187 places, 180 transitions, 2095 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:37:53,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 202 transitions, 2593 flow [2024-06-03 18:37:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 202 transitions, 2537 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:54,244 INFO L231 Difference]: Finished difference. Result has 192 places, 182 transitions, 2139 flow [2024-06-03 18:37:54,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2139, PETRI_PLACES=192, PETRI_TRANSITIONS=182} [2024-06-03 18:37:54,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-03 18:37:54,244 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 182 transitions, 2139 flow [2024-06-03 18:37:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:54,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:54,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 18:37:54,245 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:54,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2108713443, now seen corresponding path program 1 times [2024-06-03 18:37:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028946886] [2024-06-03 18:37:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028946886] [2024-06-03 18:37:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028946886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:54,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:54,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885407307] [2024-06-03 18:37:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:54,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:54,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:54,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:54,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 182 transitions, 2139 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:54,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:54,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:54,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:54,821 INFO L124 PetriNetUnfolderBase]: 2363/4155 cut-off events. [2024-06-03 18:37:54,821 INFO L125 PetriNetUnfolderBase]: For 235092/235092 co-relation queries the response was YES. [2024-06-03 18:37:54,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25837 conditions, 4155 events. 2363/4155 cut-off events. For 235092/235092 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28029 event pairs, 844 based on Foata normal form. 6/4154 useless extension candidates. Maximal degree in co-relation 25737. Up to 3658 conditions per place. [2024-06-03 18:37:54,855 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 185 selfloop transitions, 15 changer transitions 0/206 dead transitions. [2024-06-03 18:37:54,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 206 transitions, 2752 flow [2024-06-03 18:37:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 18:37:54,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-03 18:37:54,856 INFO L175 Difference]: Start difference. First operand has 192 places, 182 transitions, 2139 flow. Second operand 5 states and 119 transitions. [2024-06-03 18:37:54,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 206 transitions, 2752 flow [2024-06-03 18:37:55,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 206 transitions, 2589 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:55,357 INFO L231 Difference]: Finished difference. Result has 190 places, 183 transitions, 2029 flow [2024-06-03 18:37:55,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2029, PETRI_PLACES=190, PETRI_TRANSITIONS=183} [2024-06-03 18:37:55,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-03 18:37:55,358 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 183 transitions, 2029 flow [2024-06-03 18:37:55,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:55,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:55,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:55,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 18:37:55,358 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:55,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1811551905, now seen corresponding path program 1 times [2024-06-03 18:37:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553811580] [2024-06-03 18:37:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:55,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:55,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553811580] [2024-06-03 18:37:55,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553811580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:55,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:55,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:55,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944967485] [2024-06-03 18:37:55,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:55,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:55,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:55,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:55,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 183 transitions, 2029 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:55,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:55,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:55,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:55,921 INFO L124 PetriNetUnfolderBase]: 2350/4136 cut-off events. [2024-06-03 18:37:55,921 INFO L125 PetriNetUnfolderBase]: For 234682/234682 co-relation queries the response was YES. [2024-06-03 18:37:55,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25198 conditions, 4136 events. 2350/4136 cut-off events. For 234682/234682 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27909 event pairs, 837 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 25100. Up to 3652 conditions per place. [2024-06-03 18:37:55,962 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 184 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-03 18:37:55,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 205 transitions, 2517 flow [2024-06-03 18:37:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 18:37:55,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-03 18:37:55,964 INFO L175 Difference]: Start difference. First operand has 190 places, 183 transitions, 2029 flow. Second operand 5 states and 118 transitions. [2024-06-03 18:37:55,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 205 transitions, 2517 flow [2024-06-03 18:37:56,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 205 transitions, 2490 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:56,515 INFO L231 Difference]: Finished difference. Result has 193 places, 183 transitions, 2036 flow [2024-06-03 18:37:56,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2036, PETRI_PLACES=193, PETRI_TRANSITIONS=183} [2024-06-03 18:37:56,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-03 18:37:56,515 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 183 transitions, 2036 flow [2024-06-03 18:37:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:56,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:56,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 18:37:56,516 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:56,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash -842652273, now seen corresponding path program 1 times [2024-06-03 18:37:56,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:56,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31924765] [2024-06-03 18:37:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:56,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31924765] [2024-06-03 18:37:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31924765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:56,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:56,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:56,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451368634] [2024-06-03 18:37:56,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:56,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:56,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:56,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:56,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 183 transitions, 2036 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:56,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:56,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:56,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:57,163 INFO L124 PetriNetUnfolderBase]: 2355/4147 cut-off events. [2024-06-03 18:37:57,163 INFO L125 PetriNetUnfolderBase]: For 228285/228302 co-relation queries the response was YES. [2024-06-03 18:37:57,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25248 conditions, 4147 events. 2355/4147 cut-off events. For 228285/228302 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27965 event pairs, 907 based on Foata normal form. 13/4151 useless extension candidates. Maximal degree in co-relation 25149. Up to 3605 conditions per place. [2024-06-03 18:37:57,201 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 140 selfloop transitions, 75 changer transitions 0/221 dead transitions. [2024-06-03 18:37:57,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 221 transitions, 2790 flow [2024-06-03 18:37:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:37:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:37:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 18:37:57,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-03 18:37:57,202 INFO L175 Difference]: Start difference. First operand has 193 places, 183 transitions, 2036 flow. Second operand 11 states and 239 transitions. [2024-06-03 18:37:57,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 221 transitions, 2790 flow [2024-06-03 18:37:57,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 221 transitions, 2749 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:57,550 INFO L231 Difference]: Finished difference. Result has 200 places, 186 transitions, 2181 flow [2024-06-03 18:37:57,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2181, PETRI_PLACES=200, PETRI_TRANSITIONS=186} [2024-06-03 18:37:57,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-03 18:37:57,550 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 186 transitions, 2181 flow [2024-06-03 18:37:57,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:57,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:57,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:57,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 18:37:57,551 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:57,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash 197109937, now seen corresponding path program 2 times [2024-06-03 18:37:57,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:57,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846990254] [2024-06-03 18:37:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:57,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:57,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846990254] [2024-06-03 18:37:57,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846990254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:57,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:57,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945651323] [2024-06-03 18:37:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:57,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:57,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:57,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 186 transitions, 2181 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:57,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:57,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:57,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:58,189 INFO L124 PetriNetUnfolderBase]: 2352/4143 cut-off events. [2024-06-03 18:37:58,190 INFO L125 PetriNetUnfolderBase]: For 235155/235172 co-relation queries the response was YES. [2024-06-03 18:37:58,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25441 conditions, 4143 events. 2352/4143 cut-off events. For 235155/235172 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27911 event pairs, 907 based on Foata normal form. 13/4147 useless extension candidates. Maximal degree in co-relation 25341. Up to 3602 conditions per place. [2024-06-03 18:37:58,225 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-03 18:37:58,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 220 transitions, 2799 flow [2024-06-03 18:37:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:37:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:37:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-03 18:37:58,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-03 18:37:58,226 INFO L175 Difference]: Start difference. First operand has 200 places, 186 transitions, 2181 flow. Second operand 11 states and 238 transitions. [2024-06-03 18:37:58,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 220 transitions, 2799 flow [2024-06-03 18:37:58,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 220 transitions, 2603 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 18:37:58,736 INFO L231 Difference]: Finished difference. Result has 202 places, 186 transitions, 2143 flow [2024-06-03 18:37:58,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2143, PETRI_PLACES=202, PETRI_TRANSITIONS=186} [2024-06-03 18:37:58,736 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-03 18:37:58,736 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 186 transitions, 2143 flow [2024-06-03 18:37:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:58,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:58,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:58,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 18:37:58,737 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:58,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash -336885053, now seen corresponding path program 3 times [2024-06-03 18:37:58,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:58,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278312478] [2024-06-03 18:37:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:58,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:58,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278312478] [2024-06-03 18:37:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278312478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:58,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:58,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:58,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483401544] [2024-06-03 18:37:58,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:58,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:58,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:58,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:37:58,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 186 transitions, 2143 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:58,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:58,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:37:58,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:59,387 INFO L124 PetriNetUnfolderBase]: 2357/4156 cut-off events. [2024-06-03 18:37:59,387 INFO L125 PetriNetUnfolderBase]: For 235163/235174 co-relation queries the response was YES. [2024-06-03 18:37:59,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 4156 events. 2357/4156 cut-off events. For 235163/235174 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28064 event pairs, 910 based on Foata normal form. 9/4159 useless extension candidates. Maximal degree in co-relation 25361. Up to 3608 conditions per place. [2024-06-03 18:37:59,428 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 82 changer transitions 0/211 dead transitions. [2024-06-03 18:37:59,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 211 transitions, 2746 flow [2024-06-03 18:37:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:37:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:37:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-03 18:37:59,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-03 18:37:59,429 INFO L175 Difference]: Start difference. First operand has 202 places, 186 transitions, 2143 flow. Second operand 11 states and 228 transitions. [2024-06-03 18:37:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 211 transitions, 2746 flow [2024-06-03 18:37:59,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 211 transitions, 2586 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:37:59,961 INFO L231 Difference]: Finished difference. Result has 203 places, 189 transitions, 2190 flow [2024-06-03 18:37:59,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2190, PETRI_PLACES=203, PETRI_TRANSITIONS=189} [2024-06-03 18:37:59,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-03 18:37:59,963 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 189 transitions, 2190 flow [2024-06-03 18:37:59,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:59,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:59,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 18:37:59,964 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:59,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash -176919699, now seen corresponding path program 4 times [2024-06-03 18:37:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:59,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253575222] [2024-06-03 18:37:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:00,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253575222] [2024-06-03 18:38:00,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253575222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:00,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:00,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378269075] [2024-06-03 18:38:00,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:00,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:00,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:00,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 189 transitions, 2190 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:00,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:00,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:00,727 INFO L124 PetriNetUnfolderBase]: 2354/4152 cut-off events. [2024-06-03 18:38:00,728 INFO L125 PetriNetUnfolderBase]: For 233800/233811 co-relation queries the response was YES. [2024-06-03 18:38:00,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 4152 events. 2354/4152 cut-off events. For 233800/233811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27997 event pairs, 910 based on Foata normal form. 9/4155 useless extension candidates. Maximal degree in co-relation 25288. Up to 3605 conditions per place. [2024-06-03 18:38:00,768 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 82 changer transitions 0/210 dead transitions. [2024-06-03 18:38:00,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 210 transitions, 2648 flow [2024-06-03 18:38:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-03 18:38:00,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-03 18:38:00,769 INFO L175 Difference]: Start difference. First operand has 203 places, 189 transitions, 2190 flow. Second operand 11 states and 227 transitions. [2024-06-03 18:38:00,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 210 transitions, 2648 flow [2024-06-03 18:38:01,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 210 transitions, 2460 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:01,215 INFO L231 Difference]: Finished difference. Result has 205 places, 189 transitions, 2172 flow [2024-06-03 18:38:01,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2172, PETRI_PLACES=205, PETRI_TRANSITIONS=189} [2024-06-03 18:38:01,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 18:38:01,216 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 189 transitions, 2172 flow [2024-06-03 18:38:01,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:01,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:01,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:01,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 18:38:01,217 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:01,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:01,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1140128017, now seen corresponding path program 5 times [2024-06-03 18:38:01,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:01,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675617972] [2024-06-03 18:38:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:01,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675617972] [2024-06-03 18:38:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675617972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:01,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:01,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276424411] [2024-06-03 18:38:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:01,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:01,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 189 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:01,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:01,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:01,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:01,845 INFO L124 PetriNetUnfolderBase]: 2351/4146 cut-off events. [2024-06-03 18:38:01,845 INFO L125 PetriNetUnfolderBase]: For 240526/240526 co-relation queries the response was YES. [2024-06-03 18:38:01,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25442 conditions, 4146 events. 2351/4146 cut-off events. For 240526/240526 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27936 event pairs, 941 based on Foata normal form. 1/4138 useless extension candidates. Maximal degree in co-relation 25339. Up to 3565 conditions per place. [2024-06-03 18:38:01,884 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 107 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-06-03 18:38:01,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 203 transitions, 2598 flow [2024-06-03 18:38:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-03 18:38:01,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-03 18:38:01,886 INFO L175 Difference]: Start difference. First operand has 205 places, 189 transitions, 2172 flow. Second operand 10 states and 203 transitions. [2024-06-03 18:38:01,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 203 transitions, 2598 flow [2024-06-03 18:38:02,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 203 transitions, 2434 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:02,295 INFO L231 Difference]: Finished difference. Result has 205 places, 189 transitions, 2194 flow [2024-06-03 18:38:02,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2194, PETRI_PLACES=205, PETRI_TRANSITIONS=189} [2024-06-03 18:38:02,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 18:38:02,296 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 189 transitions, 2194 flow [2024-06-03 18:38:02,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:02,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:02,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:02,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 18:38:02,296 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:02,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:02,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1316776580, now seen corresponding path program 1 times [2024-06-03 18:38:02,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:02,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587794921] [2024-06-03 18:38:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:02,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:02,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587794921] [2024-06-03 18:38:02,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587794921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:02,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:02,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:02,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292925493] [2024-06-03 18:38:02,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:02,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:02,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:02,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:02,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 189 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:02,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:02,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:03,029 INFO L124 PetriNetUnfolderBase]: 2338/4122 cut-off events. [2024-06-03 18:38:03,029 INFO L125 PetriNetUnfolderBase]: For 256251/256268 co-relation queries the response was YES. [2024-06-03 18:38:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24609 conditions, 4122 events. 2338/4122 cut-off events. For 256251/256268 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27621 event pairs, 731 based on Foata normal form. 36/4154 useless extension candidates. Maximal degree in co-relation 24505. Up to 1560 conditions per place. [2024-06-03 18:38:03,061 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 57 changer transitions 14/240 dead transitions. [2024-06-03 18:38:03,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 240 transitions, 3092 flow [2024-06-03 18:38:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 18:38:03,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-03 18:38:03,062 INFO L175 Difference]: Start difference. First operand has 205 places, 189 transitions, 2194 flow. Second operand 9 states and 217 transitions. [2024-06-03 18:38:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 240 transitions, 3092 flow [2024-06-03 18:38:03,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 240 transitions, 2849 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:03,533 INFO L231 Difference]: Finished difference. Result has 205 places, 185 transitions, 2032 flow [2024-06-03 18:38:03,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=205, PETRI_TRANSITIONS=185} [2024-06-03 18:38:03,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 18:38:03,534 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 185 transitions, 2032 flow [2024-06-03 18:38:03,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:03,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:03,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 18:38:03,535 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:03,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1830701348, now seen corresponding path program 2 times [2024-06-03 18:38:03,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:03,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521365413] [2024-06-03 18:38:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:03,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:03,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521365413] [2024-06-03 18:38:03,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521365413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:03,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:03,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:03,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400623828] [2024-06-03 18:38:03,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:03,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:03,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:03,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:03,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:03,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 185 transitions, 2032 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:03,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:03,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:03,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:04,318 INFO L124 PetriNetUnfolderBase]: 2516/4354 cut-off events. [2024-06-03 18:38:04,318 INFO L125 PetriNetUnfolderBase]: For 332702/332719 co-relation queries the response was YES. [2024-06-03 18:38:04,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29143 conditions, 4354 events. 2516/4354 cut-off events. For 332702/332719 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28995 event pairs, 785 based on Foata normal form. 18/4368 useless extension candidates. Maximal degree in co-relation 29039. Up to 1768 conditions per place. [2024-06-03 18:38:04,363 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 154 selfloop transitions, 62 changer transitions 11/233 dead transitions. [2024-06-03 18:38:04,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 233 transitions, 2928 flow [2024-06-03 18:38:04,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 18:38:04,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-03 18:38:04,364 INFO L175 Difference]: Start difference. First operand has 205 places, 185 transitions, 2032 flow. Second operand 9 states and 212 transitions. [2024-06-03 18:38:04,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 233 transitions, 2928 flow [2024-06-03 18:38:04,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 233 transitions, 2797 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:04,973 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2043 flow [2024-06-03 18:38:04,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2043, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-03 18:38:04,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 18:38:04,974 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2043 flow [2024-06-03 18:38:04,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:04,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:04,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:04,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 18:38:04,975 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:04,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1944055328, now seen corresponding path program 3 times [2024-06-03 18:38:04,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:04,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818442790] [2024-06-03 18:38:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:04,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:05,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:05,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818442790] [2024-06-03 18:38:05,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818442790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:05,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:05,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772768744] [2024-06-03 18:38:05,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:05,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:05,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:05,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:05,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2043 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:05,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:05,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:05,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:05,691 INFO L124 PetriNetUnfolderBase]: 2399/4175 cut-off events. [2024-06-03 18:38:05,692 INFO L125 PetriNetUnfolderBase]: For 312543/312560 co-relation queries the response was YES. [2024-06-03 18:38:05,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26639 conditions, 4175 events. 2399/4175 cut-off events. For 312543/312560 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27944 event pairs, 870 based on Foata normal form. 42/4213 useless extension candidates. Maximal degree in co-relation 26535. Up to 2889 conditions per place. [2024-06-03 18:38:05,733 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 152 selfloop transitions, 53 changer transitions 18/229 dead transitions. [2024-06-03 18:38:05,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 229 transitions, 2765 flow [2024-06-03 18:38:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 18:38:05,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-03 18:38:05,734 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2043 flow. Second operand 10 states and 229 transitions. [2024-06-03 18:38:05,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 229 transitions, 2765 flow [2024-06-03 18:38:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 229 transitions, 2634 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:06,444 INFO L231 Difference]: Finished difference. Result has 203 places, 176 transitions, 1935 flow [2024-06-03 18:38:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1935, PETRI_PLACES=203, PETRI_TRANSITIONS=176} [2024-06-03 18:38:06,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-03 18:38:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 176 transitions, 1935 flow [2024-06-03 18:38:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:06,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:06,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:06,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 18:38:06,445 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:06,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1944294338, now seen corresponding path program 4 times [2024-06-03 18:38:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:06,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738984197] [2024-06-03 18:38:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:06,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:06,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:06,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738984197] [2024-06-03 18:38:06,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738984197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:06,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:06,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488988540] [2024-06-03 18:38:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:06,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:06,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 176 transitions, 1935 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:06,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:06,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:07,101 INFO L124 PetriNetUnfolderBase]: 2157/3756 cut-off events. [2024-06-03 18:38:07,101 INFO L125 PetriNetUnfolderBase]: For 268247/268264 co-relation queries the response was YES. [2024-06-03 18:38:07,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23451 conditions, 3756 events. 2157/3756 cut-off events. For 268247/268264 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 24625 event pairs, 804 based on Foata normal form. 46/3798 useless extension candidates. Maximal degree in co-relation 23349. Up to 3145 conditions per place. [2024-06-03 18:38:07,133 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 47 changer transitions 23/212 dead transitions. [2024-06-03 18:38:07,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 212 transitions, 2477 flow [2024-06-03 18:38:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 18:38:07,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-03 18:38:07,135 INFO L175 Difference]: Start difference. First operand has 203 places, 176 transitions, 1935 flow. Second operand 10 states and 218 transitions. [2024-06-03 18:38:07,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 212 transitions, 2477 flow [2024-06-03 18:38:07,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 212 transitions, 2364 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:07,648 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 1854 flow [2024-06-03 18:38:07,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1854, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-06-03 18:38:07,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-03 18:38:07,648 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 1854 flow [2024-06-03 18:38:07,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:07,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:07,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:07,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 18:38:07,649 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:07,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1146231264, now seen corresponding path program 5 times [2024-06-03 18:38:07,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:07,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387419907] [2024-06-03 18:38:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:07,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:07,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387419907] [2024-06-03 18:38:07,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387419907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:07,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:07,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:07,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568767774] [2024-06-03 18:38:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:07,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:07,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:07,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:08,198 INFO L124 PetriNetUnfolderBase]: 2061/3585 cut-off events. [2024-06-03 18:38:08,198 INFO L125 PetriNetUnfolderBase]: For 213473/213489 co-relation queries the response was YES. [2024-06-03 18:38:08,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22426 conditions, 3585 events. 2061/3585 cut-off events. For 213473/213489 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23287 event pairs, 768 based on Foata normal form. 19/3600 useless extension candidates. Maximal degree in co-relation 22326. Up to 3141 conditions per place. [2024-06-03 18:38:08,229 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 45 changer transitions 10/196 dead transitions. [2024-06-03 18:38:08,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 2330 flow [2024-06-03 18:38:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-03 18:38:08,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2024-06-03 18:38:08,230 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 1854 flow. Second operand 9 states and 193 transitions. [2024-06-03 18:38:08,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 2330 flow [2024-06-03 18:38:08,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 196 transitions, 2224 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:08,681 INFO L231 Difference]: Finished difference. Result has 193 places, 166 transitions, 1811 flow [2024-06-03 18:38:08,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=193, PETRI_TRANSITIONS=166} [2024-06-03 18:38:08,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-03 18:38:08,682 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 166 transitions, 1811 flow [2024-06-03 18:38:08,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:08,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:08,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:08,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 18:38:08,682 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:08,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash 26777568, now seen corresponding path program 6 times [2024-06-03 18:38:08,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:08,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004262042] [2024-06-03 18:38:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004262042] [2024-06-03 18:38:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004262042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:08,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064920029] [2024-06-03 18:38:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:08,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:08,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:08,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 166 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:08,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:08,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:08,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:09,276 INFO L124 PetriNetUnfolderBase]: 2229/3852 cut-off events. [2024-06-03 18:38:09,277 INFO L125 PetriNetUnfolderBase]: For 233378/233394 co-relation queries the response was YES. [2024-06-03 18:38:09,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24744 conditions, 3852 events. 2229/3852 cut-off events. For 233378/233394 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25316 event pairs, 840 based on Foata normal form. 19/3867 useless extension candidates. Maximal degree in co-relation 24647. Up to 3107 conditions per place. [2024-06-03 18:38:09,310 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 42 changer transitions 14/201 dead transitions. [2024-06-03 18:38:09,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 201 transitions, 2453 flow [2024-06-03 18:38:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 18:38:09,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-03 18:38:09,312 INFO L175 Difference]: Start difference. First operand has 193 places, 166 transitions, 1811 flow. Second operand 9 states and 199 transitions. [2024-06-03 18:38:09,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 201 transitions, 2453 flow [2024-06-03 18:38:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 201 transitions, 2353 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:09,835 INFO L231 Difference]: Finished difference. Result has 192 places, 162 transitions, 1752 flow [2024-06-03 18:38:09,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=192, PETRI_TRANSITIONS=162} [2024-06-03 18:38:09,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-03 18:38:09,835 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 162 transitions, 1752 flow [2024-06-03 18:38:09,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:09,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:09,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:09,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 18:38:09,836 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:09,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:09,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1655785022, now seen corresponding path program 7 times [2024-06-03 18:38:09,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:09,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622799862] [2024-06-03 18:38:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:09,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622799862] [2024-06-03 18:38:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622799862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:09,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:09,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52389790] [2024-06-03 18:38:09,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:09,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:09,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:09,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 162 transitions, 1752 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:09,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:09,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:09,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:10,432 INFO L124 PetriNetUnfolderBase]: 2102/3648 cut-off events. [2024-06-03 18:38:10,432 INFO L125 PetriNetUnfolderBase]: For 215194/215200 co-relation queries the response was YES. [2024-06-03 18:38:10,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22267 conditions, 3648 events. 2102/3648 cut-off events. For 215194/215200 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23939 event pairs, 686 based on Foata normal form. 34/3678 useless extension candidates. Maximal degree in co-relation 22170. Up to 2035 conditions per place. [2024-06-03 18:38:10,463 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 32 changer transitions 21/192 dead transitions. [2024-06-03 18:38:10,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 192 transitions, 2348 flow [2024-06-03 18:38:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 18:38:10,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-03 18:38:10,465 INFO L175 Difference]: Start difference. First operand has 192 places, 162 transitions, 1752 flow. Second operand 7 states and 166 transitions. [2024-06-03 18:38:10,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 192 transitions, 2348 flow [2024-06-03 18:38:10,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 192 transitions, 2242 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:10,814 INFO L231 Difference]: Finished difference. Result has 187 places, 151 transitions, 1591 flow [2024-06-03 18:38:10,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=187, PETRI_TRANSITIONS=151} [2024-06-03 18:38:10,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-03 18:38:10,814 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 151 transitions, 1591 flow [2024-06-03 18:38:10,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:10,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:10,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:10,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 18:38:10,815 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:10,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1478290244, now seen corresponding path program 1 times [2024-06-03 18:38:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:10,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470721622] [2024-06-03 18:38:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:10,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:10,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470721622] [2024-06-03 18:38:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470721622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:10,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:38:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337717402] [2024-06-03 18:38:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:38:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:38:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:38:10,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:10,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 151 transitions, 1591 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:10,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:10,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:10,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:11,308 INFO L124 PetriNetUnfolderBase]: 1868/3255 cut-off events. [2024-06-03 18:38:11,308 INFO L125 PetriNetUnfolderBase]: For 185800/185806 co-relation queries the response was YES. [2024-06-03 18:38:11,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20781 conditions, 3255 events. 1868/3255 cut-off events. For 185800/185806 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21089 event pairs, 620 based on Foata normal form. 10/3261 useless extension candidates. Maximal degree in co-relation 20685. Up to 2685 conditions per place. [2024-06-03 18:38:11,336 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-03 18:38:11,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 174 transitions, 2135 flow [2024-06-03 18:38:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:38:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:38:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 18:38:11,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 18:38:11,338 INFO L175 Difference]: Start difference. First operand has 187 places, 151 transitions, 1591 flow. Second operand 6 states and 140 transitions. [2024-06-03 18:38:11,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 174 transitions, 2135 flow [2024-06-03 18:38:11,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 174 transitions, 2040 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:11,646 INFO L231 Difference]: Finished difference. Result has 177 places, 153 transitions, 1616 flow [2024-06-03 18:38:11,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1616, PETRI_PLACES=177, PETRI_TRANSITIONS=153} [2024-06-03 18:38:11,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-03 18:38:11,647 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 153 transitions, 1616 flow [2024-06-03 18:38:11,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:11,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:11,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:11,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 18:38:11,648 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:11,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash 342834050, now seen corresponding path program 8 times [2024-06-03 18:38:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923312971] [2024-06-03 18:38:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:11,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923312971] [2024-06-03 18:38:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923312971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:11,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:11,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090067750] [2024-06-03 18:38:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:11,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 153 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:12,217 INFO L124 PetriNetUnfolderBase]: 1799/3140 cut-off events. [2024-06-03 18:38:12,218 INFO L125 PetriNetUnfolderBase]: For 158375/158381 co-relation queries the response was YES. [2024-06-03 18:38:12,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18469 conditions, 3140 events. 1799/3140 cut-off events. For 158375/158381 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20161 event pairs, 683 based on Foata normal form. 38/3174 useless extension candidates. Maximal degree in co-relation 18378. Up to 2613 conditions per place. [2024-06-03 18:38:12,240 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 26 changer transitions 21/173 dead transitions. [2024-06-03 18:38:12,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 2026 flow [2024-06-03 18:38:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 18:38:12,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-03 18:38:12,241 INFO L175 Difference]: Start difference. First operand has 177 places, 153 transitions, 1616 flow. Second operand 7 states and 156 transitions. [2024-06-03 18:38:12,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 2026 flow [2024-06-03 18:38:12,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 1976 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 18:38:12,471 INFO L231 Difference]: Finished difference. Result has 181 places, 143 transitions, 1515 flow [2024-06-03 18:38:12,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=181, PETRI_TRANSITIONS=143} [2024-06-03 18:38:12,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 18:38:12,471 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 143 transitions, 1515 flow [2024-06-03 18:38:12,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:12,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:12,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:12,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 18:38:12,472 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:12,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1360326812, now seen corresponding path program 9 times [2024-06-03 18:38:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936115770] [2024-06-03 18:38:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:12,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:12,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936115770] [2024-06-03 18:38:12,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936115770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:12,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:12,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:12,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227182639] [2024-06-03 18:38:12,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:12,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:12,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:12,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:12,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:12,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:12,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 143 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:12,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:12,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:12,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:12,942 INFO L124 PetriNetUnfolderBase]: 1578/2747 cut-off events. [2024-06-03 18:38:12,942 INFO L125 PetriNetUnfolderBase]: For 123253/123259 co-relation queries the response was YES. [2024-06-03 18:38:12,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15328 conditions, 2747 events. 1578/2747 cut-off events. For 123253/123259 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17029 event pairs, 558 based on Foata normal form. 38/2781 useless extension candidates. Maximal degree in co-relation 15236. Up to 2250 conditions per place. [2024-06-03 18:38:12,965 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 25 changer transitions 7/160 dead transitions. [2024-06-03 18:38:12,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 160 transitions, 1891 flow [2024-06-03 18:38:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:38:12,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 18:38:12,966 INFO L175 Difference]: Start difference. First operand has 181 places, 143 transitions, 1515 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:38:12,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 160 transitions, 1891 flow [2024-06-03 18:38:13,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 160 transitions, 1823 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:13,109 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1443 flow [2024-06-03 18:38:13,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-06-03 18:38:13,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-03 18:38:13,109 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1443 flow [2024-06-03 18:38:13,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:13,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:13,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:13,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 18:38:13,110 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:13,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957850, now seen corresponding path program 1 times [2024-06-03 18:38:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563927908] [2024-06-03 18:38:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563927908] [2024-06-03 18:38:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563927908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:13,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:13,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:13,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39304480] [2024-06-03 18:38:13,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:13,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:13,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:13,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:13,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:13,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:13,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:13,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:13,569 INFO L124 PetriNetUnfolderBase]: 1498/2627 cut-off events. [2024-06-03 18:38:13,569 INFO L125 PetriNetUnfolderBase]: For 100285/100291 co-relation queries the response was YES. [2024-06-03 18:38:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14545 conditions, 2627 events. 1498/2627 cut-off events. For 100285/100291 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16204 event pairs, 383 based on Foata normal form. 34/2657 useless extension candidates. Maximal degree in co-relation 14458. Up to 2022 conditions per place. [2024-06-03 18:38:13,589 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 32 changer transitions 5/167 dead transitions. [2024-06-03 18:38:13,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 167 transitions, 1950 flow [2024-06-03 18:38:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 18:38:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-03 18:38:13,591 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1443 flow. Second operand 8 states and 173 transitions. [2024-06-03 18:38:13,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 167 transitions, 1950 flow [2024-06-03 18:38:13,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 167 transitions, 1870 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:13,731 INFO L231 Difference]: Finished difference. Result has 167 places, 141 transitions, 1505 flow [2024-06-03 18:38:13,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1505, PETRI_PLACES=167, PETRI_TRANSITIONS=141} [2024-06-03 18:38:13,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-03 18:38:13,732 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 141 transitions, 1505 flow [2024-06-03 18:38:13,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:13,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:13,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:13,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 18:38:13,732 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:13,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957664, now seen corresponding path program 1 times [2024-06-03 18:38:13,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:13,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343477644] [2024-06-03 18:38:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:13,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:13,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:13,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343477644] [2024-06-03 18:38:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343477644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:13,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:13,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:38:13,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366100014] [2024-06-03 18:38:13,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:38:13,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:38:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:38:13,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:13,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 141 transitions, 1505 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:13,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:13,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:13,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:14,126 INFO L124 PetriNetUnfolderBase]: 1384/2423 cut-off events. [2024-06-03 18:38:14,126 INFO L125 PetriNetUnfolderBase]: For 72555/72558 co-relation queries the response was YES. [2024-06-03 18:38:14,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 2423 events. 1384/2423 cut-off events. For 72555/72558 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14584 event pairs, 363 based on Foata normal form. 8/2427 useless extension candidates. Maximal degree in co-relation 13410. Up to 1930 conditions per place. [2024-06-03 18:38:14,146 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 121 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2024-06-03 18:38:14,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 161 transitions, 1891 flow [2024-06-03 18:38:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:38:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:38:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 18:38:14,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 18:38:14,147 INFO L175 Difference]: Start difference. First operand has 167 places, 141 transitions, 1505 flow. Second operand 6 states and 138 transitions. [2024-06-03 18:38:14,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 161 transitions, 1891 flow [2024-06-03 18:38:14,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 1806 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:14,255 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1496 flow [2024-06-03 18:38:14,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1496, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-03 18:38:14,255 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-03 18:38:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1496 flow [2024-06-03 18:38:14,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:14,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:14,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:14,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 18:38:14,256 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:14,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash -317784606, now seen corresponding path program 2 times [2024-06-03 18:38:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:14,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253814896] [2024-06-03 18:38:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:14,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:14,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:14,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253814896] [2024-06-03 18:38:14,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253814896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:14,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:14,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118459165] [2024-06-03 18:38:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:14,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:14,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:14,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1496 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:14,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:14,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:14,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:14,658 INFO L124 PetriNetUnfolderBase]: 1344/2321 cut-off events. [2024-06-03 18:38:14,658 INFO L125 PetriNetUnfolderBase]: For 67255/67258 co-relation queries the response was YES. [2024-06-03 18:38:14,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12724 conditions, 2321 events. 1344/2321 cut-off events. For 67255/67258 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13564 event pairs, 423 based on Foata normal form. 10/2327 useless extension candidates. Maximal degree in co-relation 12640. Up to 1938 conditions per place. [2024-06-03 18:38:14,676 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 22 changer transitions 9/162 dead transitions. [2024-06-03 18:38:14,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 162 transitions, 1972 flow [2024-06-03 18:38:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 18:38:14,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-03 18:38:14,677 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1496 flow. Second operand 8 states and 167 transitions. [2024-06-03 18:38:14,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 162 transitions, 1972 flow [2024-06-03 18:38:14,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 162 transitions, 1872 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:14,780 INFO L231 Difference]: Finished difference. Result has 168 places, 137 transitions, 1394 flow [2024-06-03 18:38:14,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=168, PETRI_TRANSITIONS=137} [2024-06-03 18:38:14,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-03 18:38:14,781 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 137 transitions, 1394 flow [2024-06-03 18:38:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:14,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:14,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 18:38:14,782 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:14,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash -214580646, now seen corresponding path program 3 times [2024-06-03 18:38:14,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:14,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811832292] [2024-06-03 18:38:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:14,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:14,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811832292] [2024-06-03 18:38:14,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811832292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:14,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:14,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:14,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953130884] [2024-06-03 18:38:14,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:14,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:14,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:14,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:14,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:14,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 137 transitions, 1394 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:14,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:14,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:14,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:15,138 INFO L124 PetriNetUnfolderBase]: 1176/2027 cut-off events. [2024-06-03 18:38:15,138 INFO L125 PetriNetUnfolderBase]: For 59283/59286 co-relation queries the response was YES. [2024-06-03 18:38:15,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 2027 events. 1176/2027 cut-off events. For 59283/59286 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11520 event pairs, 349 based on Foata normal form. 10/2033 useless extension candidates. Maximal degree in co-relation 10938. Up to 1752 conditions per place. [2024-06-03 18:38:15,154 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 18 changer transitions 12/153 dead transitions. [2024-06-03 18:38:15,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 153 transitions, 1744 flow [2024-06-03 18:38:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 18:38:15,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:38:15,155 INFO L175 Difference]: Start difference. First operand has 168 places, 137 transitions, 1394 flow. Second operand 8 states and 160 transitions. [2024-06-03 18:38:15,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 153 transitions, 1744 flow [2024-06-03 18:38:15,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 153 transitions, 1680 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:15,235 INFO L231 Difference]: Finished difference. Result has 160 places, 132 transitions, 1317 flow [2024-06-03 18:38:15,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=160, PETRI_TRANSITIONS=132} [2024-06-03 18:38:15,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-03 18:38:15,236 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 132 transitions, 1317 flow [2024-06-03 18:38:15,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:15,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:15,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 18:38:15,237 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:15,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 26421414, now seen corresponding path program 4 times [2024-06-03 18:38:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:15,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114463663] [2024-06-03 18:38:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:15,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:15,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:15,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114463663] [2024-06-03 18:38:15,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114463663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:15,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:15,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489792101] [2024-06-03 18:38:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:15,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:15,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:15,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:15,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 132 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:15,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:15,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:15,636 INFO L124 PetriNetUnfolderBase]: 1094/1883 cut-off events. [2024-06-03 18:38:15,636 INFO L125 PetriNetUnfolderBase]: For 52307/52310 co-relation queries the response was YES. [2024-06-03 18:38:15,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10354 conditions, 1883 events. 1094/1883 cut-off events. For 52307/52310 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10460 event pairs, 245 based on Foata normal form. 8/1887 useless extension candidates. Maximal degree in co-relation 10274. Up to 1556 conditions per place. [2024-06-03 18:38:15,650 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 30 changer transitions 0/153 dead transitions. [2024-06-03 18:38:15,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 153 transitions, 1711 flow [2024-06-03 18:38:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 18:38:15,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-03 18:38:15,651 INFO L175 Difference]: Start difference. First operand has 160 places, 132 transitions, 1317 flow. Second operand 8 states and 167 transitions. [2024-06-03 18:38:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 153 transitions, 1711 flow [2024-06-03 18:38:15,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 153 transitions, 1630 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:15,706 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1334 flow [2024-06-03 18:38:15,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1334, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-03 18:38:15,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-03 18:38:15,707 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1334 flow [2024-06-03 18:38:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:15,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:15,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 18:38:15,707 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:15,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1239035288, now seen corresponding path program 5 times [2024-06-03 18:38:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235381615] [2024-06-03 18:38:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235381615] [2024-06-03 18:38:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235381615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:15,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:15,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115712974] [2024-06-03 18:38:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:15,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:15,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:15,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:15,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:15,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:15,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:15,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:16,040 INFO L124 PetriNetUnfolderBase]: 1114/1915 cut-off events. [2024-06-03 18:38:16,041 INFO L125 PetriNetUnfolderBase]: For 42675/42678 co-relation queries the response was YES. [2024-06-03 18:38:16,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 1915 events. 1114/1915 cut-off events. For 42675/42678 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10682 event pairs, 248 based on Foata normal form. 8/1919 useless extension candidates. Maximal degree in co-relation 9975. Up to 1508 conditions per place. [2024-06-03 18:38:16,053 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 118 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-03 18:38:16,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 1736 flow [2024-06-03 18:38:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 18:38:16,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 18:38:16,054 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1334 flow. Second operand 8 states and 168 transitions. [2024-06-03 18:38:16,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 1736 flow [2024-06-03 18:38:16,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 156 transitions, 1628 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:16,112 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 1318 flow [2024-06-03 18:38:16,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2024-06-03 18:38:16,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-03 18:38:16,112 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 1318 flow [2024-06-03 18:38:16,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:16,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 18:38:16,113 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:16,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1174173086, now seen corresponding path program 2 times [2024-06-03 18:38:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:16,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989211843] [2024-06-03 18:38:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989211843] [2024-06-03 18:38:16,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989211843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:16,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:16,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:16,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039754716] [2024-06-03 18:38:16,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:16,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:16,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:16,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 1318 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:16,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:16,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:16,474 INFO L124 PetriNetUnfolderBase]: 1134/1949 cut-off events. [2024-06-03 18:38:16,474 INFO L125 PetriNetUnfolderBase]: For 44751/44754 co-relation queries the response was YES. [2024-06-03 18:38:16,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 1949 events. 1134/1949 cut-off events. For 44751/44754 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10924 event pairs, 338 based on Foata normal form. 8/1943 useless extension candidates. Maximal degree in co-relation 10119. Up to 1598 conditions per place. [2024-06-03 18:38:16,487 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 31 changer transitions 0/161 dead transitions. [2024-06-03 18:38:16,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 161 transitions, 1800 flow [2024-06-03 18:38:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 18:38:16,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-03 18:38:16,489 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 1318 flow. Second operand 8 states and 175 transitions. [2024-06-03 18:38:16,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 161 transitions, 1800 flow [2024-06-03 18:38:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 161 transitions, 1720 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:16,548 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 1326 flow [2024-06-03 18:38:16,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1326, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-03 18:38:16,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-03 18:38:16,548 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 1326 flow [2024-06-03 18:38:16,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:16,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 18:38:16,549 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:16,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:16,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1174233536, now seen corresponding path program 3 times [2024-06-03 18:38:16,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:16,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467729788] [2024-06-03 18:38:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:16,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467729788] [2024-06-03 18:38:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467729788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:16,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:16,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:16,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332450114] [2024-06-03 18:38:16,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:16,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:16,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:16,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:16,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:16,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:16,905 INFO L124 PetriNetUnfolderBase]: 1116/1928 cut-off events. [2024-06-03 18:38:16,905 INFO L125 PetriNetUnfolderBase]: For 42800/42803 co-relation queries the response was YES. [2024-06-03 18:38:16,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 1928 events. 1116/1928 cut-off events. For 42800/42803 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10836 event pairs, 341 based on Foata normal form. 10/1929 useless extension candidates. Maximal degree in co-relation 9682. Up to 1632 conditions per place. [2024-06-03 18:38:16,919 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 28 changer transitions 0/153 dead transitions. [2024-06-03 18:38:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 153 transitions, 1678 flow [2024-06-03 18:38:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:38:16,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 18:38:16,920 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 1326 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:38:16,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 153 transitions, 1678 flow [2024-06-03 18:38:16,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 153 transitions, 1598 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:16,980 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1307 flow [2024-06-03 18:38:16,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-06-03 18:38:16,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-03 18:38:16,980 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1307 flow [2024-06-03 18:38:16,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:16,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:16,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 18:38:16,981 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:16,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1459272956, now seen corresponding path program 4 times [2024-06-03 18:38:16,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:16,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816094223] [2024-06-03 18:38:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:16,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:17,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:17,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816094223] [2024-06-03 18:38:17,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816094223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:17,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:17,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:17,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454169699] [2024-06-03 18:38:17,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:17,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:17,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:17,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1307 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:17,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:17,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:17,364 INFO L124 PetriNetUnfolderBase]: 1136/1959 cut-off events. [2024-06-03 18:38:17,365 INFO L125 PetriNetUnfolderBase]: For 43016/43019 co-relation queries the response was YES. [2024-06-03 18:38:17,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 1959 events. 1136/1959 cut-off events. For 43016/43019 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11003 event pairs, 246 based on Foata normal form. 8/1957 useless extension candidates. Maximal degree in co-relation 9758. Up to 1545 conditions per place. [2024-06-03 18:38:17,377 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-03 18:38:17,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 162 transitions, 1797 flow [2024-06-03 18:38:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 18:38:17,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-03 18:38:17,379 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1307 flow. Second operand 7 states and 159 transitions. [2024-06-03 18:38:17,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 162 transitions, 1797 flow [2024-06-03 18:38:17,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 162 transitions, 1714 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:17,439 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1324 flow [2024-06-03 18:38:17,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-03 18:38:17,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-03 18:38:17,440 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1324 flow [2024-06-03 18:38:17,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:17,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:17,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 18:38:17,440 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:17,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700796, now seen corresponding path program 5 times [2024-06-03 18:38:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:17,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983285814] [2024-06-03 18:38:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:17,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:17,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983285814] [2024-06-03 18:38:17,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983285814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:17,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:17,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:38:17,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56565383] [2024-06-03 18:38:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:38:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:38:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:38:17,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:17,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1324 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:17,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:17,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:17,750 INFO L124 PetriNetUnfolderBase]: 1143/1976 cut-off events. [2024-06-03 18:38:17,750 INFO L125 PetriNetUnfolderBase]: For 44252/44252 co-relation queries the response was YES. [2024-06-03 18:38:17,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1976 events. 1143/1976 cut-off events. For 44252/44252 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11161 event pairs, 210 based on Foata normal form. 6/1971 useless extension candidates. Maximal degree in co-relation 9900. Up to 1125 conditions per place. [2024-06-03 18:38:17,764 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 108 selfloop transitions, 44 changer transitions 0/158 dead transitions. [2024-06-03 18:38:17,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 158 transitions, 1804 flow [2024-06-03 18:38:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:38:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:38:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 18:38:17,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 18:38:17,765 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1324 flow. Second operand 6 states and 136 transitions. [2024-06-03 18:38:17,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 158 transitions, 1804 flow [2024-06-03 18:38:17,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 158 transitions, 1716 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:17,830 INFO L231 Difference]: Finished difference. Result has 155 places, 137 transitions, 1352 flow [2024-06-03 18:38:17,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=155, PETRI_TRANSITIONS=137} [2024-06-03 18:38:17,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-03 18:38:17,831 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 137 transitions, 1352 flow [2024-06-03 18:38:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 18:38:17,831 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1856888870, now seen corresponding path program 6 times [2024-06-03 18:38:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134430093] [2024-06-03 18:38:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:17,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134430093] [2024-06-03 18:38:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134430093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621471189] [2024-06-03 18:38:17,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:17,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:17,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:17,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 137 transitions, 1352 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:17,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:18,180 INFO L124 PetriNetUnfolderBase]: 1125/1955 cut-off events. [2024-06-03 18:38:18,181 INFO L125 PetriNetUnfolderBase]: For 41683/41683 co-relation queries the response was YES. [2024-06-03 18:38:18,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9647 conditions, 1955 events. 1125/1955 cut-off events. For 41683/41683 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11108 event pairs, 356 based on Foata normal form. 8/1957 useless extension candidates. Maximal degree in co-relation 9569. Up to 1651 conditions per place. [2024-06-03 18:38:18,194 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 112 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-03 18:38:18,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 149 transitions, 1680 flow [2024-06-03 18:38:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 18:38:18,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 18:38:18,196 INFO L175 Difference]: Start difference. First operand has 155 places, 137 transitions, 1352 flow. Second operand 7 states and 147 transitions. [2024-06-03 18:38:18,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 149 transitions, 1680 flow [2024-06-03 18:38:18,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 149 transitions, 1605 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 18:38:18,277 INFO L231 Difference]: Finished difference. Result has 159 places, 137 transitions, 1344 flow [2024-06-03 18:38:18,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1344, PETRI_PLACES=159, PETRI_TRANSITIONS=137} [2024-06-03 18:38:18,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-03 18:38:18,278 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 137 transitions, 1344 flow [2024-06-03 18:38:18,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:18,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:18,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:18,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 18:38:18,278 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:18,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 23382812, now seen corresponding path program 6 times [2024-06-03 18:38:18,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:18,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845092046] [2024-06-03 18:38:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:18,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:18,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:18,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845092046] [2024-06-03 18:38:18,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845092046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:18,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:18,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:18,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730969580] [2024-06-03 18:38:18,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:18,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:18,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:18,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:18,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 137 transitions, 1344 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:18,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:18,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:18,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:18,723 INFO L124 PetriNetUnfolderBase]: 1394/2407 cut-off events. [2024-06-03 18:38:18,723 INFO L125 PetriNetUnfolderBase]: For 88360/88360 co-relation queries the response was YES. [2024-06-03 18:38:18,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 2407 events. 1394/2407 cut-off events. For 88360/88360 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14241 event pairs, 438 based on Foata normal form. 30/2431 useless extension candidates. Maximal degree in co-relation 12497. Up to 1571 conditions per place. [2024-06-03 18:38:18,740 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 59 changer transitions 4/168 dead transitions. [2024-06-03 18:38:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 168 transitions, 1915 flow [2024-06-03 18:38:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 18:38:18,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 18:38:18,741 INFO L175 Difference]: Start difference. First operand has 159 places, 137 transitions, 1344 flow. Second operand 10 states and 215 transitions. [2024-06-03 18:38:18,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 168 transitions, 1915 flow [2024-06-03 18:38:18,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 168 transitions, 1840 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:18,853 INFO L231 Difference]: Finished difference. Result has 164 places, 140 transitions, 1463 flow [2024-06-03 18:38:18,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1463, PETRI_PLACES=164, PETRI_TRANSITIONS=140} [2024-06-03 18:38:18,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-03 18:38:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 1463 flow [2024-06-03 18:38:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:18,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:18,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:18,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 18:38:18,855 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:18,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -789865812, now seen corresponding path program 7 times [2024-06-03 18:38:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806883053] [2024-06-03 18:38:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806883053] [2024-06-03 18:38:18,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806883053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:18,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:18,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:18,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170957919] [2024-06-03 18:38:18,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:18,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:18,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:18,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 140 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:18,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:18,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:18,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:19,256 INFO L124 PetriNetUnfolderBase]: 1295/2256 cut-off events. [2024-06-03 18:38:19,257 INFO L125 PetriNetUnfolderBase]: For 68609/68609 co-relation queries the response was YES. [2024-06-03 18:38:19,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 2256 events. 1295/2256 cut-off events. For 68609/68609 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13188 event pairs, 447 based on Foata normal form. 34/2284 useless extension candidates. Maximal degree in co-relation 10788. Up to 1741 conditions per place. [2024-06-03 18:38:19,272 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 52 changer transitions 3/159 dead transitions. [2024-06-03 18:38:19,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 159 transitions, 1835 flow [2024-06-03 18:38:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 18:38:19,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-03 18:38:19,273 INFO L175 Difference]: Start difference. First operand has 164 places, 140 transitions, 1463 flow. Second operand 9 states and 190 transitions. [2024-06-03 18:38:19,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 159 transitions, 1835 flow [2024-06-03 18:38:19,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 159 transitions, 1685 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:19,363 INFO L231 Difference]: Finished difference. Result has 164 places, 139 transitions, 1417 flow [2024-06-03 18:38:19,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1417, PETRI_PLACES=164, PETRI_TRANSITIONS=139} [2024-06-03 18:38:19,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-03 18:38:19,363 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 139 transitions, 1417 flow [2024-06-03 18:38:19,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:19,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:19,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:19,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 18:38:19,364 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:19,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1959420732, now seen corresponding path program 2 times [2024-06-03 18:38:19,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:19,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652748161] [2024-06-03 18:38:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652748161] [2024-06-03 18:38:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652748161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:19,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:19,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199039345] [2024-06-03 18:38:19,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:19,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:19,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:19,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 139 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:19,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:19,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:19,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:19,753 INFO L124 PetriNetUnfolderBase]: 1305/2265 cut-off events. [2024-06-03 18:38:19,753 INFO L125 PetriNetUnfolderBase]: For 44680/44680 co-relation queries the response was YES. [2024-06-03 18:38:19,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10756 conditions, 2265 events. 1305/2265 cut-off events. For 44680/44680 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13298 event pairs, 432 based on Foata normal form. 6/2265 useless extension candidates. Maximal degree in co-relation 10676. Up to 1885 conditions per place. [2024-06-03 18:38:19,768 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 36 changer transitions 0/156 dead transitions. [2024-06-03 18:38:19,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 156 transitions, 1800 flow [2024-06-03 18:38:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 18:38:19,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-03 18:38:19,769 INFO L175 Difference]: Start difference. First operand has 164 places, 139 transitions, 1417 flow. Second operand 8 states and 166 transitions. [2024-06-03 18:38:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 156 transitions, 1800 flow [2024-06-03 18:38:19,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 156 transitions, 1700 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:19,859 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1421 flow [2024-06-03 18:38:19,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1421, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-03 18:38:19,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-03 18:38:19,860 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1421 flow [2024-06-03 18:38:19,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:19,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:19,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:19,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 18:38:19,860 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:19,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash 436689878, now seen corresponding path program 3 times [2024-06-03 18:38:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:19,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100404828] [2024-06-03 18:38:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100404828] [2024-06-03 18:38:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100404828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70504462] [2024-06-03 18:38:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:19,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:20,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:20,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1421 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:20,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:20,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:20,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:20,303 INFO L124 PetriNetUnfolderBase]: 1325/2302 cut-off events. [2024-06-03 18:38:20,303 INFO L125 PetriNetUnfolderBase]: For 47496/47496 co-relation queries the response was YES. [2024-06-03 18:38:20,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2302 events. 1325/2302 cut-off events. For 47496/47496 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13493 event pairs, 328 based on Foata normal form. 6/2302 useless extension candidates. Maximal degree in co-relation 10947. Up to 1781 conditions per place. [2024-06-03 18:38:20,319 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 107 selfloop transitions, 47 changer transitions 0/160 dead transitions. [2024-06-03 18:38:20,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 160 transitions, 1836 flow [2024-06-03 18:38:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:38:20,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 18:38:20,321 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1421 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:38:20,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 160 transitions, 1836 flow [2024-06-03 18:38:20,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 160 transitions, 1747 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:20,405 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1459 flow [2024-06-03 18:38:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1459, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-03 18:38:20,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-03 18:38:20,405 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1459 flow [2024-06-03 18:38:20,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:20,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:20,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:20,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 18:38:20,406 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:20,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:20,406 INFO L85 PathProgramCache]: Analyzing trace with hash 436689692, now seen corresponding path program 8 times [2024-06-03 18:38:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811537998] [2024-06-03 18:38:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:20,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:20,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811537998] [2024-06-03 18:38:20,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811537998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:20,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:20,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:20,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478441846] [2024-06-03 18:38:20,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:20,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:20,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:20,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:20,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:20,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:20,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:20,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:20,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:20,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:20,873 INFO L124 PetriNetUnfolderBase]: 1548/2683 cut-off events. [2024-06-03 18:38:20,877 INFO L125 PetriNetUnfolderBase]: For 94615/94615 co-relation queries the response was YES. [2024-06-03 18:38:20,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13519 conditions, 2683 events. 1548/2683 cut-off events. For 94615/94615 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16301 event pairs, 433 based on Foata normal form. 30/2707 useless extension candidates. Maximal degree in co-relation 13437. Up to 1383 conditions per place. [2024-06-03 18:38:20,896 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 65 changer transitions 8/174 dead transitions. [2024-06-03 18:38:20,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 2049 flow [2024-06-03 18:38:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 18:38:20,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-03 18:38:20,898 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1459 flow. Second operand 9 states and 201 transitions. [2024-06-03 18:38:20,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 2049 flow [2024-06-03 18:38:21,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 174 transitions, 1932 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:21,017 INFO L231 Difference]: Finished difference. Result has 171 places, 142 transitions, 1501 flow [2024-06-03 18:38:21,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1501, PETRI_PLACES=171, PETRI_TRANSITIONS=142} [2024-06-03 18:38:21,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-03 18:38:21,017 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 142 transitions, 1501 flow [2024-06-03 18:38:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:21,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:21,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 18:38:21,018 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:21,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:21,018 INFO L85 PathProgramCache]: Analyzing trace with hash 436927028, now seen corresponding path program 4 times [2024-06-03 18:38:21,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:21,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500089288] [2024-06-03 18:38:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:21,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500089288] [2024-06-03 18:38:21,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500089288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:21,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:21,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:38:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310972437] [2024-06-03 18:38:21,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:38:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:38:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:38:21,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:21,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 142 transitions, 1501 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:21,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:21,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:21,361 INFO L124 PetriNetUnfolderBase]: 1262/2174 cut-off events. [2024-06-03 18:38:21,361 INFO L125 PetriNetUnfolderBase]: For 69105/69105 co-relation queries the response was YES. [2024-06-03 18:38:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11394 conditions, 2174 events. 1262/2174 cut-off events. For 69105/69105 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12472 event pairs, 273 based on Foata normal form. 6/2171 useless extension candidates. Maximal degree in co-relation 11310. Up to 1415 conditions per place. [2024-06-03 18:38:21,378 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 50 changer transitions 0/162 dead transitions. [2024-06-03 18:38:21,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 1889 flow [2024-06-03 18:38:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:38:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:38:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 18:38:21,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:38:21,380 INFO L175 Difference]: Start difference. First operand has 171 places, 142 transitions, 1501 flow. Second operand 6 states and 135 transitions. [2024-06-03 18:38:21,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 1889 flow [2024-06-03 18:38:21,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 162 transitions, 1725 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:21,492 INFO L231 Difference]: Finished difference. Result has 170 places, 142 transitions, 1441 flow [2024-06-03 18:38:21,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1441, PETRI_PLACES=170, PETRI_TRANSITIONS=142} [2024-06-03 18:38:21,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-03 18:38:21,493 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 142 transitions, 1441 flow [2024-06-03 18:38:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:21,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:21,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 18:38:21,493 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:21,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash -422772606, now seen corresponding path program 9 times [2024-06-03 18:38:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088209377] [2024-06-03 18:38:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088209377] [2024-06-03 18:38:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088209377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:21,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:21,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454066961] [2024-06-03 18:38:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:21,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:21,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 142 transitions, 1441 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:21,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:21,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:21,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:21,839 INFO L124 PetriNetUnfolderBase]: 1163/2014 cut-off events. [2024-06-03 18:38:21,839 INFO L125 PetriNetUnfolderBase]: For 45546/45546 co-relation queries the response was YES. [2024-06-03 18:38:21,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 2014 events. 1163/2014 cut-off events. For 45546/45546 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11419 event pairs, 379 based on Foata normal form. 8/2017 useless extension candidates. Maximal degree in co-relation 9657. Up to 1690 conditions per place. [2024-06-03 18:38:21,857 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 52 changer transitions 0/156 dead transitions. [2024-06-03 18:38:21,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 156 transitions, 1809 flow [2024-06-03 18:38:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 18:38:21,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-03 18:38:21,858 INFO L175 Difference]: Start difference. First operand has 170 places, 142 transitions, 1441 flow. Second operand 8 states and 167 transitions. [2024-06-03 18:38:21,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 156 transitions, 1809 flow [2024-06-03 18:38:21,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 156 transitions, 1591 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:21,955 INFO L231 Difference]: Finished difference. Result has 170 places, 143 transitions, 1358 flow [2024-06-03 18:38:21,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=170, PETRI_TRANSITIONS=143} [2024-06-03 18:38:21,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-03 18:38:21,956 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 143 transitions, 1358 flow [2024-06-03 18:38:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:21,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:21,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:21,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 18:38:21,957 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:21,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1817276100, now seen corresponding path program 10 times [2024-06-03 18:38:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:21,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781734316] [2024-06-03 18:38:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:21,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:22,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781734316] [2024-06-03 18:38:22,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781734316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:22,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565308105] [2024-06-03 18:38:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:22,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:22,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 143 transitions, 1358 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:22,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:22,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:22,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:22,294 INFO L124 PetriNetUnfolderBase]: 1178/2051 cut-off events. [2024-06-03 18:38:22,294 INFO L125 PetriNetUnfolderBase]: For 45056/45056 co-relation queries the response was YES. [2024-06-03 18:38:22,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9321 conditions, 2051 events. 1178/2051 cut-off events. For 45056/45056 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11753 event pairs, 376 based on Foata normal form. 8/2054 useless extension candidates. Maximal degree in co-relation 9239. Up to 1607 conditions per place. [2024-06-03 18:38:22,309 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 54 changer transitions 0/161 dead transitions. [2024-06-03 18:38:22,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 161 transitions, 1762 flow [2024-06-03 18:38:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:38:22,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 18:38:22,310 INFO L175 Difference]: Start difference. First operand has 170 places, 143 transitions, 1358 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:38:22,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 161 transitions, 1762 flow [2024-06-03 18:38:22,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 161 transitions, 1641 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:22,389 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1377 flow [2024-06-03 18:38:22,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-03 18:38:22,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-03 18:38:22,389 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1377 flow [2024-06-03 18:38:22,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:22,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:22,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 18:38:22,390 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:22,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2133485176, now seen corresponding path program 11 times [2024-06-03 18:38:22,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:22,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435818329] [2024-06-03 18:38:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:22,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:22,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435818329] [2024-06-03 18:38:22,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435818329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:22,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:22,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221001700] [2024-06-03 18:38:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:22,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:22,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:22,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:22,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:22,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:22,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:22,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:22,796 INFO L124 PetriNetUnfolderBase]: 1198/2079 cut-off events. [2024-06-03 18:38:22,796 INFO L125 PetriNetUnfolderBase]: For 45324/45324 co-relation queries the response was YES. [2024-06-03 18:38:22,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9510 conditions, 2079 events. 1198/2079 cut-off events. For 45324/45324 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11897 event pairs, 385 based on Foata normal form. 6/2080 useless extension candidates. Maximal degree in co-relation 9427. Up to 1768 conditions per place. [2024-06-03 18:38:22,811 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 119 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-06-03 18:38:22,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 159 transitions, 1749 flow [2024-06-03 18:38:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 18:38:22,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-03 18:38:22,812 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1377 flow. Second operand 8 states and 164 transitions. [2024-06-03 18:38:22,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 159 transitions, 1749 flow [2024-06-03 18:38:22,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 159 transitions, 1621 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:22,900 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 1351 flow [2024-06-03 18:38:22,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-06-03 18:38:22,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-03 18:38:22,900 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 1351 flow [2024-06-03 18:38:22,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:22,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:22,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:22,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 18:38:22,902 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:22,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2133605146, now seen corresponding path program 12 times [2024-06-03 18:38:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:22,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983794432] [2024-06-03 18:38:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:22,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:23,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983794432] [2024-06-03 18:38:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983794432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:23,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756771612] [2024-06-03 18:38:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:23,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:23,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:23,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 1351 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:23,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:23,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:23,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:23,279 INFO L124 PetriNetUnfolderBase]: 1218/2117 cut-off events. [2024-06-03 18:38:23,280 INFO L125 PetriNetUnfolderBase]: For 47425/47425 co-relation queries the response was YES. [2024-06-03 18:38:23,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9590 conditions, 2117 events. 1218/2117 cut-off events. For 47425/47425 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12259 event pairs, 378 based on Foata normal form. 6/2118 useless extension candidates. Maximal degree in co-relation 9506. Up to 1547 conditions per place. [2024-06-03 18:38:23,294 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 60 changer transitions 0/165 dead transitions. [2024-06-03 18:38:23,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 165 transitions, 1771 flow [2024-06-03 18:38:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 18:38:23,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 18:38:23,295 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 1351 flow. Second operand 8 states and 172 transitions. [2024-06-03 18:38:23,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 165 transitions, 1771 flow [2024-06-03 18:38:23,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 165 transitions, 1653 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:23,406 INFO L231 Difference]: Finished difference. Result has 175 places, 146 transitions, 1389 flow [2024-06-03 18:38:23,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=175, PETRI_TRANSITIONS=146} [2024-06-03 18:38:23,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-03 18:38:23,407 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 146 transitions, 1389 flow [2024-06-03 18:38:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:23,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:23,407 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] [2024-06-03 18:38:23,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 18:38:23,407 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:23,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash 834469572, now seen corresponding path program 13 times [2024-06-03 18:38:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:23,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083654035] [2024-06-03 18:38:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:23,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:23,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:23,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083654035] [2024-06-03 18:38:23,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083654035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:23,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766154985] [2024-06-03 18:38:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:23,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:23,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 146 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:23,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:23,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:23,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:23,802 INFO L124 PetriNetUnfolderBase]: 1279/2220 cut-off events. [2024-06-03 18:38:23,802 INFO L125 PetriNetUnfolderBase]: For 57668/57668 co-relation queries the response was YES. [2024-06-03 18:38:23,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10559 conditions, 2220 events. 1279/2220 cut-off events. For 57668/57668 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12891 event pairs, 301 based on Foata normal form. 6/2221 useless extension candidates. Maximal degree in co-relation 10475. Up to 1706 conditions per place. [2024-06-03 18:38:23,819 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 53 changer transitions 0/173 dead transitions. [2024-06-03 18:38:23,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 1975 flow [2024-06-03 18:38:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 18:38:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-03 18:38:23,820 INFO L175 Difference]: Start difference. First operand has 175 places, 146 transitions, 1389 flow. Second operand 9 states and 188 transitions. [2024-06-03 18:38:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 1975 flow [2024-06-03 18:38:23,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 173 transitions, 1824 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:23,927 INFO L231 Difference]: Finished difference. Result has 177 places, 150 transitions, 1430 flow [2024-06-03 18:38:23,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1430, PETRI_PLACES=177, PETRI_TRANSITIONS=150} [2024-06-03 18:38:23,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-03 18:38:23,927 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 150 transitions, 1430 flow [2024-06-03 18:38:23,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:23,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:23,928 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, 1] [2024-06-03 18:38:23,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 18:38:23,928 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:23,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash -82564728, now seen corresponding path program 14 times [2024-06-03 18:38:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:23,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740606842] [2024-06-03 18:38:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:24,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:24,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740606842] [2024-06-03 18:38:24,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740606842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:24,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:24,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:24,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495703277] [2024-06-03 18:38:24,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:24,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:24,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:24,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 150 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:24,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:24,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:24,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:24,327 INFO L124 PetriNetUnfolderBase]: 1266/2193 cut-off events. [2024-06-03 18:38:24,327 INFO L125 PetriNetUnfolderBase]: For 50353/50353 co-relation queries the response was YES. [2024-06-03 18:38:24,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9998 conditions, 2193 events. 1266/2193 cut-off events. For 50353/50353 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12760 event pairs, 291 based on Foata normal form. 6/2194 useless extension candidates. Maximal degree in co-relation 9914. Up to 1772 conditions per place. [2024-06-03 18:38:24,344 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 50 changer transitions 0/168 dead transitions. [2024-06-03 18:38:24,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 168 transitions, 1816 flow [2024-06-03 18:38:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 18:38:24,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-03 18:38:24,345 INFO L175 Difference]: Start difference. First operand has 177 places, 150 transitions, 1430 flow. Second operand 8 states and 169 transitions. [2024-06-03 18:38:24,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 168 transitions, 1816 flow [2024-06-03 18:38:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 168 transitions, 1697 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 18:38:24,442 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1415 flow [2024-06-03 18:38:24,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1415, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-03 18:38:24,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 18:38:24,442 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1415 flow [2024-06-03 18:38:24,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:24,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:24,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:24,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 18:38:24,443 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:24,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1994765280, now seen corresponding path program 15 times [2024-06-03 18:38:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144551358] [2024-06-03 18:38:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144551358] [2024-06-03 18:38:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144551358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:24,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:24,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660127079] [2024-06-03 18:38:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:24,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:24,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:24,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:24,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1415 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:24,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:24,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:24,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:24,805 INFO L124 PetriNetUnfolderBase]: 1380/2377 cut-off events. [2024-06-03 18:38:24,805 INFO L125 PetriNetUnfolderBase]: For 73421/73421 co-relation queries the response was YES. [2024-06-03 18:38:24,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 2377 events. 1380/2377 cut-off events. For 73421/73421 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13975 event pairs, 411 based on Foata normal form. 6/2378 useless extension candidates. Maximal degree in co-relation 11280. Up to 1240 conditions per place. [2024-06-03 18:38:24,822 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 76 changer transitions 0/173 dead transitions. [2024-06-03 18:38:24,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 173 transitions, 1933 flow [2024-06-03 18:38:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 18:38:24,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-03 18:38:24,823 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1415 flow. Second operand 8 states and 174 transitions. [2024-06-03 18:38:24,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 173 transitions, 1933 flow [2024-06-03 18:38:25,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 1807 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:25,007 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1445 flow [2024-06-03 18:38:25,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-03 18:38:25,009 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 18:38:25,009 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1445 flow [2024-06-03 18:38:25,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:25,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:25,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:25,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 18:38:25,009 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:25,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1417345264, now seen corresponding path program 1 times [2024-06-03 18:38:25,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:25,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824681933] [2024-06-03 18:38:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:25,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:25,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:25,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824681933] [2024-06-03 18:38:25,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824681933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:25,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:25,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:25,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099807604] [2024-06-03 18:38:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:25,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:25,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:25,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:25,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1445 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:25,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:25,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:25,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:25,458 INFO L124 PetriNetUnfolderBase]: 1582/2757 cut-off events. [2024-06-03 18:38:25,459 INFO L125 PetriNetUnfolderBase]: For 120138/120139 co-relation queries the response was YES. [2024-06-03 18:38:25,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13861 conditions, 2757 events. 1582/2757 cut-off events. For 120138/120139 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16993 event pairs, 324 based on Foata normal form. 19/2772 useless extension candidates. Maximal degree in co-relation 13775. Up to 1872 conditions per place. [2024-06-03 18:38:25,480 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 27 changer transitions 11/185 dead transitions. [2024-06-03 18:38:25,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 185 transitions, 2046 flow [2024-06-03 18:38:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 18:38:25,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 18:38:25,481 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1445 flow. Second operand 7 states and 164 transitions. [2024-06-03 18:38:25,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 185 transitions, 2046 flow [2024-06-03 18:38:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 185 transitions, 1802 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:25,678 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1278 flow [2024-06-03 18:38:25,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1278, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-03 18:38:25,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 18:38:25,678 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1278 flow [2024-06-03 18:38:25,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:25,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:25,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:25,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 18:38:25,679 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:25,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1502548144, now seen corresponding path program 2 times [2024-06-03 18:38:25,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:25,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544728143] [2024-06-03 18:38:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:25,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:25,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:25,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544728143] [2024-06-03 18:38:25,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544728143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:25,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:25,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:25,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600650259] [2024-06-03 18:38:25,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:25,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:25,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1278 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:25,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:25,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:25,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:26,126 INFO L124 PetriNetUnfolderBase]: 1371/2402 cut-off events. [2024-06-03 18:38:26,126 INFO L125 PetriNetUnfolderBase]: For 82343/82344 co-relation queries the response was YES. [2024-06-03 18:38:26,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 2402 events. 1371/2402 cut-off events. For 82343/82344 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14421 event pairs, 306 based on Foata normal form. 19/2417 useless extension candidates. Maximal degree in co-relation 10508. Up to 1667 conditions per place. [2024-06-03 18:38:26,143 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 140 selfloop transitions, 22 changer transitions 10/178 dead transitions. [2024-06-03 18:38:26,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 178 transitions, 1824 flow [2024-06-03 18:38:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 18:38:26,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 18:38:26,144 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1278 flow. Second operand 7 states and 158 transitions. [2024-06-03 18:38:26,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 178 transitions, 1824 flow [2024-06-03 18:38:26,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 178 transitions, 1778 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:26,308 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 1243 flow [2024-06-03 18:38:26,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1243, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-03 18:38:26,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-03 18:38:26,308 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 1243 flow [2024-06-03 18:38:26,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:26,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:26,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:26,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 18:38:26,309 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:26,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 790980898, now seen corresponding path program 1 times [2024-06-03 18:38:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:26,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707151781] [2024-06-03 18:38:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:26,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:26,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:26,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707151781] [2024-06-03 18:38:26,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707151781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:26,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:26,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:26,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614301328] [2024-06-03 18:38:26,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:26,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:26,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:26,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:26,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 1243 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:26,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:26,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:26,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:26,715 INFO L124 PetriNetUnfolderBase]: 1335/2334 cut-off events. [2024-06-03 18:38:26,715 INFO L125 PetriNetUnfolderBase]: For 79149/79150 co-relation queries the response was YES. [2024-06-03 18:38:26,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 2334 events. 1335/2334 cut-off events. For 79149/79150 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13891 event pairs, 237 based on Foata normal form. 19/2349 useless extension candidates. Maximal degree in co-relation 10183. Up to 1667 conditions per place. [2024-06-03 18:38:26,731 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 138 selfloop transitions, 23 changer transitions 8/175 dead transitions. [2024-06-03 18:38:26,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 1791 flow [2024-06-03 18:38:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 18:38:26,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-03 18:38:26,732 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 1243 flow. Second operand 7 states and 159 transitions. [2024-06-03 18:38:26,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 1791 flow [2024-06-03 18:38:26,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 175 transitions, 1737 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:26,898 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 1223 flow [2024-06-03 18:38:26,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1223, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2024-06-03 18:38:26,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-03 18:38:26,899 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 1223 flow [2024-06-03 18:38:26,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:26,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:26,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 18:38:26,899 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:26,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash 790986478, now seen corresponding path program 2 times [2024-06-03 18:38:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:26,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945558580] [2024-06-03 18:38:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945558580] [2024-06-03 18:38:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945558580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:26,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870206365] [2024-06-03 18:38:26,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:26,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:27,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:27,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 1223 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:27,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:27,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:27,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:27,284 INFO L124 PetriNetUnfolderBase]: 1230/2147 cut-off events. [2024-06-03 18:38:27,284 INFO L125 PetriNetUnfolderBase]: For 57126/57127 co-relation queries the response was YES. [2024-06-03 18:38:27,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 2147 events. 1230/2147 cut-off events. For 57126/57127 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12557 event pairs, 219 based on Foata normal form. 19/2162 useless extension candidates. Maximal degree in co-relation 8714. Up to 1667 conditions per place. [2024-06-03 18:38:27,299 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 135 selfloop transitions, 20 changer transitions 10/171 dead transitions. [2024-06-03 18:38:27,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 171 transitions, 1653 flow [2024-06-03 18:38:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:38:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:38:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 18:38:27,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-03 18:38:27,302 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 1223 flow. Second operand 7 states and 157 transitions. [2024-06-03 18:38:27,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 171 transitions, 1653 flow [2024-06-03 18:38:27,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 171 transitions, 1603 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:27,424 INFO L231 Difference]: Finished difference. Result has 175 places, 140 transitions, 1171 flow [2024-06-03 18:38:27,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1171, PETRI_PLACES=175, PETRI_TRANSITIONS=140} [2024-06-03 18:38:27,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-03 18:38:27,424 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 140 transitions, 1171 flow [2024-06-03 18:38:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:27,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:27,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:27,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 18:38:27,425 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:27,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash 819070702, now seen corresponding path program 3 times [2024-06-03 18:38:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:27,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412602292] [2024-06-03 18:38:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:27,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:27,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:27,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412602292] [2024-06-03 18:38:27,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412602292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:27,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:27,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874514854] [2024-06-03 18:38:27,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:27,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:27,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:27,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:27,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:27,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 140 transitions, 1171 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:27,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:27,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:27,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:27,836 INFO L124 PetriNetUnfolderBase]: 1283/2244 cut-off events. [2024-06-03 18:38:27,836 INFO L125 PetriNetUnfolderBase]: For 79192/79193 co-relation queries the response was YES. [2024-06-03 18:38:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9897 conditions, 2244 events. 1283/2244 cut-off events. For 79192/79193 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13251 event pairs, 239 based on Foata normal form. 19/2260 useless extension candidates. Maximal degree in co-relation 9814. Up to 1579 conditions per place. [2024-06-03 18:38:27,853 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 24 changer transitions 8/179 dead transitions. [2024-06-03 18:38:27,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 179 transitions, 1763 flow [2024-06-03 18:38:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 18:38:27,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-03 18:38:27,854 INFO L175 Difference]: Start difference. First operand has 175 places, 140 transitions, 1171 flow. Second operand 10 states and 211 transitions. [2024-06-03 18:38:27,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 179 transitions, 1763 flow [2024-06-03 18:38:28,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1691 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:28,005 INFO L231 Difference]: Finished difference. Result has 176 places, 138 transitions, 1135 flow [2024-06-03 18:38:28,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1135, PETRI_PLACES=176, PETRI_TRANSITIONS=138} [2024-06-03 18:38:28,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-03 18:38:28,005 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 138 transitions, 1135 flow [2024-06-03 18:38:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:28,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:28,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 18:38:28,006 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:28,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 819065122, now seen corresponding path program 4 times [2024-06-03 18:38:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:28,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179061740] [2024-06-03 18:38:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:28,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:28,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179061740] [2024-06-03 18:38:28,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179061740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:28,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:28,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:28,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166854851] [2024-06-03 18:38:28,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:28,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:28,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:28,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:28,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 138 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:28,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:28,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:28,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:28,397 INFO L124 PetriNetUnfolderBase]: 1178/2057 cut-off events. [2024-06-03 18:38:28,398 INFO L125 PetriNetUnfolderBase]: For 56995/56996 co-relation queries the response was YES. [2024-06-03 18:38:28,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 2057 events. 1178/2057 cut-off events. For 56995/56996 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 227 based on Foata normal form. 19/2073 useless extension candidates. Maximal degree in co-relation 8366. Up to 1579 conditions per place. [2024-06-03 18:38:28,411 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 21 changer transitions 12/168 dead transitions. [2024-06-03 18:38:28,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 168 transitions, 1573 flow [2024-06-03 18:38:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 18:38:28,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-03 18:38:28,412 INFO L175 Difference]: Start difference. First operand has 176 places, 138 transitions, 1135 flow. Second operand 8 states and 174 transitions. [2024-06-03 18:38:28,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 168 transitions, 1573 flow [2024-06-03 18:38:28,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 168 transitions, 1498 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:28,529 INFO L231 Difference]: Finished difference. Result has 172 places, 136 transitions, 1091 flow [2024-06-03 18:38:28,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1091, PETRI_PLACES=172, PETRI_TRANSITIONS=136} [2024-06-03 18:38:28,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-03 18:38:28,529 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 136 transitions, 1091 flow [2024-06-03 18:38:28,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:28,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:28,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:28,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 18:38:28,530 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:28,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 815346052, now seen corresponding path program 5 times [2024-06-03 18:38:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536405616] [2024-06-03 18:38:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:28,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:28,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536405616] [2024-06-03 18:38:28,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536405616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:28,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:28,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94422976] [2024-06-03 18:38:28,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:28,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:28,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 136 transitions, 1091 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:28,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:28,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:28,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:28,884 INFO L124 PetriNetUnfolderBase]: 1154/2005 cut-off events. [2024-06-03 18:38:28,885 INFO L125 PetriNetUnfolderBase]: For 56873/56874 co-relation queries the response was YES. [2024-06-03 18:38:28,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8193 conditions, 2005 events. 1154/2005 cut-off events. For 56873/56874 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11480 event pairs, 246 based on Foata normal form. 19/2021 useless extension candidates. Maximal degree in co-relation 8112. Up to 1511 conditions per place. [2024-06-03 18:38:28,898 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 123 selfloop transitions, 17 changer transitions 20/166 dead transitions. [2024-06-03 18:38:28,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 166 transitions, 1525 flow [2024-06-03 18:38:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 18:38:28,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 18:38:28,899 INFO L175 Difference]: Start difference. First operand has 172 places, 136 transitions, 1091 flow. Second operand 8 states and 172 transitions. [2024-06-03 18:38:28,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 166 transitions, 1525 flow [2024-06-03 18:38:29,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 1479 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:29,011 INFO L231 Difference]: Finished difference. Result has 169 places, 130 transitions, 1028 flow [2024-06-03 18:38:29,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=169, PETRI_TRANSITIONS=130} [2024-06-03 18:38:29,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-03 18:38:29,012 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 130 transitions, 1028 flow [2024-06-03 18:38:29,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:29,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:29,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:29,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 18:38:29,012 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:29,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2039329870, now seen corresponding path program 3 times [2024-06-03 18:38:29,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:29,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607410598] [2024-06-03 18:38:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:29,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:29,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607410598] [2024-06-03 18:38:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607410598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:29,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914574734] [2024-06-03 18:38:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:29,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:29,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:29,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 130 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:29,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:29,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:29,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:29,487 INFO L124 PetriNetUnfolderBase]: 1327/2298 cut-off events. [2024-06-03 18:38:29,487 INFO L125 PetriNetUnfolderBase]: For 112501/112502 co-relation queries the response was YES. [2024-06-03 18:38:29,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11478 conditions, 2298 events. 1327/2298 cut-off events. For 112501/112502 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13713 event pairs, 418 based on Foata normal form. 19/2313 useless extension candidates. Maximal degree in co-relation 11398. Up to 1268 conditions per place. [2024-06-03 18:38:29,503 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 43 changer transitions 11/178 dead transitions. [2024-06-03 18:38:29,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 178 transitions, 1736 flow [2024-06-03 18:38:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-03 18:38:29,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 18:38:29,504 INFO L175 Difference]: Start difference. First operand has 169 places, 130 transitions, 1028 flow. Second operand 13 states and 273 transitions. [2024-06-03 18:38:29,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 178 transitions, 1736 flow [2024-06-03 18:38:29,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 1629 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:29,712 INFO L231 Difference]: Finished difference. Result has 165 places, 128 transitions, 1008 flow [2024-06-03 18:38:29,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1008, PETRI_PLACES=165, PETRI_TRANSITIONS=128} [2024-06-03 18:38:29,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-03 18:38:29,713 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 128 transitions, 1008 flow [2024-06-03 18:38:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:29,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:29,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:29,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 18:38:29,713 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:29,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2039628400, now seen corresponding path program 4 times [2024-06-03 18:38:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:29,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818726592] [2024-06-03 18:38:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:29,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:29,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818726592] [2024-06-03 18:38:29,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818726592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646366332] [2024-06-03 18:38:29,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:29,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:29,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:29,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:29,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 128 transitions, 1008 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:29,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:29,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:29,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:30,173 INFO L124 PetriNetUnfolderBase]: 1390/2399 cut-off events. [2024-06-03 18:38:30,173 INFO L125 PetriNetUnfolderBase]: For 129555/129556 co-relation queries the response was YES. [2024-06-03 18:38:30,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2399 events. 1390/2399 cut-off events. For 129555/129556 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14453 event pairs, 498 based on Foata normal form. 19/2414 useless extension candidates. Maximal degree in co-relation 12647. Up to 1268 conditions per place. [2024-06-03 18:38:30,190 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 41 changer transitions 9/173 dead transitions. [2024-06-03 18:38:30,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 1690 flow [2024-06-03 18:38:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-03 18:38:30,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-03 18:38:30,191 INFO L175 Difference]: Start difference. First operand has 165 places, 128 transitions, 1008 flow. Second operand 13 states and 270 transitions. [2024-06-03 18:38:30,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 1690 flow [2024-06-03 18:38:30,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 173 transitions, 1594 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:30,334 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 982 flow [2024-06-03 18:38:30,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=982, PETRI_PLACES=164, PETRI_TRANSITIONS=125} [2024-06-03 18:38:30,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-03 18:38:30,334 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 982 flow [2024-06-03 18:38:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:30,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:30,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:30,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 18:38:30,335 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:30,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 348325792, now seen corresponding path program 5 times [2024-06-03 18:38:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:30,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007638758] [2024-06-03 18:38:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:30,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:30,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007638758] [2024-06-03 18:38:30,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007638758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:30,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:30,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:30,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920017702] [2024-06-03 18:38:30,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:30,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:30,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:30,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:30,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 125 transitions, 982 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:30,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:30,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:30,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:30,779 INFO L124 PetriNetUnfolderBase]: 1264/2181 cut-off events. [2024-06-03 18:38:30,780 INFO L125 PetriNetUnfolderBase]: For 105377/105378 co-relation queries the response was YES. [2024-06-03 18:38:30,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10856 conditions, 2181 events. 1264/2181 cut-off events. For 105377/105378 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12808 event pairs, 482 based on Foata normal form. 25/2202 useless extension candidates. Maximal degree in co-relation 10782. Up to 1502 conditions per place. [2024-06-03 18:38:30,794 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 38 changer transitions 13/163 dead transitions. [2024-06-03 18:38:30,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 163 transitions, 1520 flow [2024-06-03 18:38:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-03 18:38:30,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-03 18:38:30,797 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 982 flow. Second operand 12 states and 247 transitions. [2024-06-03 18:38:30,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 163 transitions, 1520 flow [2024-06-03 18:38:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 1427 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-03 18:38:30,887 INFO L231 Difference]: Finished difference. Result has 160 places, 122 transitions, 946 flow [2024-06-03 18:38:30,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=946, PETRI_PLACES=160, PETRI_TRANSITIONS=122} [2024-06-03 18:38:30,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-03 18:38:30,888 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 122 transitions, 946 flow [2024-06-03 18:38:30,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:30,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:30,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 18:38:30,888 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:30,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash 154446832, now seen corresponding path program 6 times [2024-06-03 18:38:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:30,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143952133] [2024-06-03 18:38:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:30,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143952133] [2024-06-03 18:38:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143952133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:30,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:30,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:30,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199380649] [2024-06-03 18:38:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:30,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:30,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:30,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:31,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:31,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 122 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:31,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:31,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:31,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:31,333 INFO L124 PetriNetUnfolderBase]: 1204/2069 cut-off events. [2024-06-03 18:38:31,333 INFO L125 PetriNetUnfolderBase]: For 98730/98731 co-relation queries the response was YES. [2024-06-03 18:38:31,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10306 conditions, 2069 events. 1204/2069 cut-off events. For 98730/98731 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11976 event pairs, 508 based on Foata normal form. 27/2092 useless extension candidates. Maximal degree in co-relation 10234. Up to 1713 conditions per place. [2024-06-03 18:38:31,345 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 94 selfloop transitions, 33 changer transitions 17/150 dead transitions. [2024-06-03 18:38:31,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 150 transitions, 1322 flow [2024-06-03 18:38:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-03 18:38:31,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-03 18:38:31,347 INFO L175 Difference]: Start difference. First operand has 160 places, 122 transitions, 946 flow. Second operand 12 states and 237 transitions. [2024-06-03 18:38:31,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 150 transitions, 1322 flow [2024-06-03 18:38:31,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 150 transitions, 1248 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:31,426 INFO L231 Difference]: Finished difference. Result has 158 places, 117 transitions, 906 flow [2024-06-03 18:38:31,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=906, PETRI_PLACES=158, PETRI_TRANSITIONS=117} [2024-06-03 18:38:31,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-03 18:38:31,427 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 117 transitions, 906 flow [2024-06-03 18:38:31,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:31,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:31,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:31,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 18:38:31,427 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:31,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1319196880, now seen corresponding path program 7 times [2024-06-03 18:38:31,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:31,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534145034] [2024-06-03 18:38:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:31,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534145034] [2024-06-03 18:38:31,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534145034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:31,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:31,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:31,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8887515] [2024-06-03 18:38:31,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:31,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:31,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:31,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 117 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:31,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:31,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:31,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:31,807 INFO L124 PetriNetUnfolderBase]: 1071/1846 cut-off events. [2024-06-03 18:38:31,808 INFO L125 PetriNetUnfolderBase]: For 70349/70350 co-relation queries the response was YES. [2024-06-03 18:38:31,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8462 conditions, 1846 events. 1071/1846 cut-off events. For 70349/70350 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10431 event pairs, 384 based on Foata normal form. 25/1867 useless extension candidates. Maximal degree in co-relation 8391. Up to 1268 conditions per place. [2024-06-03 18:38:31,819 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 31 changer transitions 10/148 dead transitions. [2024-06-03 18:38:31,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 1390 flow [2024-06-03 18:38:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-03 18:38:31,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-03 18:38:31,820 INFO L175 Difference]: Start difference. First operand has 158 places, 117 transitions, 906 flow. Second operand 11 states and 223 transitions. [2024-06-03 18:38:31,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 1390 flow [2024-06-03 18:38:31,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 1312 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:31,918 INFO L231 Difference]: Finished difference. Result has 153 places, 114 transitions, 874 flow [2024-06-03 18:38:31,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=874, PETRI_PLACES=153, PETRI_TRANSITIONS=114} [2024-06-03 18:38:31,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-03 18:38:31,919 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 114 transitions, 874 flow [2024-06-03 18:38:31,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:31,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:31,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:31,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 18:38:31,919 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:31,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash -232150688, now seen corresponding path program 8 times [2024-06-03 18:38:31,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:31,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947462140] [2024-06-03 18:38:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:31,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:32,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:32,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947462140] [2024-06-03 18:38:32,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947462140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:32,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:32,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905057422] [2024-06-03 18:38:32,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:32,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:32,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:32,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:32,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 114 transitions, 874 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:32,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:32,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:32,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:32,296 INFO L124 PetriNetUnfolderBase]: 920/1577 cut-off events. [2024-06-03 18:38:32,297 INFO L125 PetriNetUnfolderBase]: For 44711/44712 co-relation queries the response was YES. [2024-06-03 18:38:32,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6446 conditions, 1577 events. 920/1577 cut-off events. For 44711/44712 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8554 event pairs, 329 based on Foata normal form. 27/1600 useless extension candidates. Maximal degree in co-relation 6377. Up to 1268 conditions per place. [2024-06-03 18:38:32,306 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 25 changer transitions 19/137 dead transitions. [2024-06-03 18:38:32,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 137 transitions, 1212 flow [2024-06-03 18:38:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-03 18:38:32,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-06-03 18:38:32,307 INFO L175 Difference]: Start difference. First operand has 153 places, 114 transitions, 874 flow. Second operand 10 states and 199 transitions. [2024-06-03 18:38:32,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 137 transitions, 1212 flow [2024-06-03 18:38:32,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 137 transitions, 1149 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:32,363 INFO L231 Difference]: Finished difference. Result has 150 places, 108 transitions, 820 flow [2024-06-03 18:38:32,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=820, PETRI_PLACES=150, PETRI_TRANSITIONS=108} [2024-06-03 18:38:32,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-03 18:38:32,364 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 108 transitions, 820 flow [2024-06-03 18:38:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:32,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:32,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:32,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 18:38:32,365 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:32,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2007476048, now seen corresponding path program 9 times [2024-06-03 18:38:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185847284] [2024-06-03 18:38:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:32,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185847284] [2024-06-03 18:38:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185847284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:32,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160463529] [2024-06-03 18:38:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:32,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 108 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:32,797 INFO L124 PetriNetUnfolderBase]: 1088/1888 cut-off events. [2024-06-03 18:38:32,797 INFO L125 PetriNetUnfolderBase]: For 70272/70273 co-relation queries the response was YES. [2024-06-03 18:38:32,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8994 conditions, 1888 events. 1088/1888 cut-off events. For 70272/70273 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10751 event pairs, 329 based on Foata normal form. 19/1903 useless extension candidates. Maximal degree in co-relation 8926. Up to 1050 conditions per place. [2024-06-03 18:38:32,809 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 29 changer transitions 15/155 dead transitions. [2024-06-03 18:38:32,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 155 transitions, 1448 flow [2024-06-03 18:38:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-03 18:38:32,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-03 18:38:32,810 INFO L175 Difference]: Start difference. First operand has 150 places, 108 transitions, 820 flow. Second operand 12 states and 249 transitions. [2024-06-03 18:38:32,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 155 transitions, 1448 flow [2024-06-03 18:38:32,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1374 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:32,897 INFO L231 Difference]: Finished difference. Result has 144 places, 106 transitions, 809 flow [2024-06-03 18:38:32,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=809, PETRI_PLACES=144, PETRI_TRANSITIONS=106} [2024-06-03 18:38:32,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-03 18:38:32,898 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 106 transitions, 809 flow [2024-06-03 18:38:32,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:32,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:32,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:32,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 18:38:32,899 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:32,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1073247804, now seen corresponding path program 10 times [2024-06-03 18:38:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:32,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669145524] [2024-06-03 18:38:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669145524] [2024-06-03 18:38:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669145524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:33,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:33,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132088039] [2024-06-03 18:38:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:33,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:33,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:33,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:33,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 106 transitions, 809 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:33,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:33,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:33,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:33,308 INFO L124 PetriNetUnfolderBase]: 956/1650 cut-off events. [2024-06-03 18:38:33,308 INFO L125 PetriNetUnfolderBase]: For 48772/48773 co-relation queries the response was YES. [2024-06-03 18:38:33,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 1650 events. 956/1650 cut-off events. For 48772/48773 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9153 event pairs, 317 based on Foata normal form. 19/1665 useless extension candidates. Maximal degree in co-relation 7392. Up to 1050 conditions per place. [2024-06-03 18:38:33,319 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 26 changer transitions 18/139 dead transitions. [2024-06-03 18:38:33,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1267 flow [2024-06-03 18:38:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 18:38:33,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-03 18:38:33,320 INFO L175 Difference]: Start difference. First operand has 144 places, 106 transitions, 809 flow. Second operand 10 states and 207 transitions. [2024-06-03 18:38:33,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1267 flow [2024-06-03 18:38:33,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 139 transitions, 1202 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:33,369 INFO L231 Difference]: Finished difference. Result has 141 places, 103 transitions, 785 flow [2024-06-03 18:38:33,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=785, PETRI_PLACES=141, PETRI_TRANSITIONS=103} [2024-06-03 18:38:33,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-03 18:38:33,369 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 103 transitions, 785 flow [2024-06-03 18:38:33,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:33,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:33,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:33,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 18:38:33,370 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:33,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1063070814, now seen corresponding path program 11 times [2024-06-03 18:38:33,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:33,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3679264] [2024-06-03 18:38:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:33,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:33,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:33,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3679264] [2024-06-03 18:38:33,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3679264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:33,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:33,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107331430] [2024-06-03 18:38:33,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:33,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:33,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 103 transitions, 785 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:33,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:33,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:33,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:33,696 INFO L124 PetriNetUnfolderBase]: 1093/1886 cut-off events. [2024-06-03 18:38:33,696 INFO L125 PetriNetUnfolderBase]: For 61573/61573 co-relation queries the response was YES. [2024-06-03 18:38:33,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8975 conditions, 1886 events. 1093/1886 cut-off events. For 61573/61573 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10948 event pairs, 316 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8911. Up to 849 conditions per place. [2024-06-03 18:38:33,708 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 27 changer transitions 22/133 dead transitions. [2024-06-03 18:38:33,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 133 transitions, 1236 flow [2024-06-03 18:38:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 18:38:33,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 18:38:33,709 INFO L175 Difference]: Start difference. First operand has 141 places, 103 transitions, 785 flow. Second operand 8 states and 172 transitions. [2024-06-03 18:38:33,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 133 transitions, 1236 flow [2024-06-03 18:38:33,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 133 transitions, 1172 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:33,765 INFO L231 Difference]: Finished difference. Result has 134 places, 98 transitions, 747 flow [2024-06-03 18:38:33,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=747, PETRI_PLACES=134, PETRI_TRANSITIONS=98} [2024-06-03 18:38:33,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-03 18:38:33,765 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 98 transitions, 747 flow [2024-06-03 18:38:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:33,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:33,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:33,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 18:38:33,766 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:33,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1729188270, now seen corresponding path program 12 times [2024-06-03 18:38:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:33,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698037485] [2024-06-03 18:38:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:33,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:33,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:33,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698037485] [2024-06-03 18:38:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698037485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705785625] [2024-06-03 18:38:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:33,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:33,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 98 transitions, 747 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:33,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:33,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:33,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:34,099 INFO L124 PetriNetUnfolderBase]: 951/1623 cut-off events. [2024-06-03 18:38:34,099 INFO L125 PetriNetUnfolderBase]: For 46485/46485 co-relation queries the response was YES. [2024-06-03 18:38:34,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7275 conditions, 1623 events. 951/1623 cut-off events. For 46485/46485 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9028 event pairs, 396 based on Foata normal form. 26/1647 useless extension candidates. Maximal degree in co-relation 7213. Up to 1337 conditions per place. [2024-06-03 18:38:34,108 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 71 selfloop transitions, 23 changer transitions 12/112 dead transitions. [2024-06-03 18:38:34,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 112 transitions, 1011 flow [2024-06-03 18:38:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 18:38:34,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-03 18:38:34,109 INFO L175 Difference]: Start difference. First operand has 134 places, 98 transitions, 747 flow. Second operand 10 states and 189 transitions. [2024-06-03 18:38:34,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 112 transitions, 1011 flow [2024-06-03 18:38:34,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 112 transitions, 944 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:34,138 INFO L231 Difference]: Finished difference. Result has 127 places, 94 transitions, 701 flow [2024-06-03 18:38:34,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2024-06-03 18:38:34,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-03 18:38:34,139 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 701 flow [2024-06-03 18:38:34,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:34,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:34,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:34,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 18:38:34,139 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:34,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1784824960, now seen corresponding path program 6 times [2024-06-03 18:38:34,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:34,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040099215] [2024-06-03 18:38:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:34,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:34,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040099215] [2024-06-03 18:38:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040099215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:34,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:34,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293736904] [2024-06-03 18:38:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:34,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 701 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:34,460 INFO L124 PetriNetUnfolderBase]: 990/1694 cut-off events. [2024-06-03 18:38:34,460 INFO L125 PetriNetUnfolderBase]: For 43451/43451 co-relation queries the response was YES. [2024-06-03 18:38:34,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1694 events. 990/1694 cut-off events. For 43451/43451 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9582 event pairs, 302 based on Foata normal form. 18/1710 useless extension candidates. Maximal degree in co-relation 7827. Up to 826 conditions per place. [2024-06-03 18:38:34,469 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 80 selfloop transitions, 29 changer transitions 8/123 dead transitions. [2024-06-03 18:38:34,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 123 transitions, 1176 flow [2024-06-03 18:38:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-03 18:38:34,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-03 18:38:34,471 INFO L175 Difference]: Start difference. First operand has 127 places, 94 transitions, 701 flow. Second operand 11 states and 217 transitions. [2024-06-03 18:38:34,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 123 transitions, 1176 flow [2024-06-03 18:38:34,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 123 transitions, 1118 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:34,512 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 721 flow [2024-06-03 18:38:34,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=721, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-03 18:38:34,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-03 18:38:34,513 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 721 flow [2024-06-03 18:38:34,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:34,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:34,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 18:38:34,514 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:34,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1779266350, now seen corresponding path program 7 times [2024-06-03 18:38:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434940410] [2024-06-03 18:38:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:34,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:34,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:34,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434940410] [2024-06-03 18:38:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434940410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:34,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:34,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034235664] [2024-06-03 18:38:34,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:34,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 721 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:34,988 INFO L124 PetriNetUnfolderBase]: 1067/1835 cut-off events. [2024-06-03 18:38:34,989 INFO L125 PetriNetUnfolderBase]: For 50833/50833 co-relation queries the response was YES. [2024-06-03 18:38:34,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8868 conditions, 1835 events. 1067/1835 cut-off events. For 50833/50833 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10659 event pairs, 485 based on Foata normal form. 24/1857 useless extension candidates. Maximal degree in co-relation 8811. Up to 1299 conditions per place. [2024-06-03 18:38:35,000 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 20 changer transitions 12/114 dead transitions. [2024-06-03 18:38:35,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 114 transitions, 1083 flow [2024-06-03 18:38:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 18:38:35,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-06-03 18:38:35,001 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 721 flow. Second operand 10 states and 193 transitions. [2024-06-03 18:38:35,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 114 transitions, 1083 flow [2024-06-03 18:38:35,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 1029 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:35,035 INFO L231 Difference]: Finished difference. Result has 125 places, 89 transitions, 673 flow [2024-06-03 18:38:35,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=673, PETRI_PLACES=125, PETRI_TRANSITIONS=89} [2024-06-03 18:38:35,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-03 18:38:35,036 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 89 transitions, 673 flow [2024-06-03 18:38:35,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:35,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:35,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 18:38:35,037 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:35,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1784830540, now seen corresponding path program 8 times [2024-06-03 18:38:35,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:35,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827344452] [2024-06-03 18:38:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827344452] [2024-06-03 18:38:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827344452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:35,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:35,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386897232] [2024-06-03 18:38:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:35,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:35,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:35,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:35,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 89 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:35,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:35,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:35,357 INFO L124 PetriNetUnfolderBase]: 933/1601 cut-off events. [2024-06-03 18:38:35,358 INFO L125 PetriNetUnfolderBase]: For 40809/40809 co-relation queries the response was YES. [2024-06-03 18:38:35,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7515 conditions, 1601 events. 933/1601 cut-off events. For 40809/40809 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 8983 event pairs, 296 based on Foata normal form. 18/1617 useless extension candidates. Maximal degree in co-relation 7459. Up to 826 conditions per place. [2024-06-03 18:38:35,366 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 23 changer transitions 9/116 dead transitions. [2024-06-03 18:38:35,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 116 transitions, 1123 flow [2024-06-03 18:38:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-03 18:38:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-06-03 18:38:35,367 INFO L175 Difference]: Start difference. First operand has 125 places, 89 transitions, 673 flow. Second operand 10 states and 199 transitions. [2024-06-03 18:38:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 116 transitions, 1123 flow [2024-06-03 18:38:35,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 116 transitions, 1068 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:35,390 INFO L231 Difference]: Finished difference. Result has 122 places, 86 transitions, 652 flow [2024-06-03 18:38:35,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=122, PETRI_TRANSITIONS=86} [2024-06-03 18:38:35,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-03 18:38:35,390 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 86 transitions, 652 flow [2024-06-03 18:38:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:35,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:35,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 18:38:35,391 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:35,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1773545920, now seen corresponding path program 9 times [2024-06-03 18:38:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:35,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744058100] [2024-06-03 18:38:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:35,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744058100] [2024-06-03 18:38:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744058100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:35,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:35,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:35,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047299749] [2024-06-03 18:38:35,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:35,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:35,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:35,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 86 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:35,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:35,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:35,680 INFO L124 PetriNetUnfolderBase]: 808/1384 cut-off events. [2024-06-03 18:38:35,680 INFO L125 PetriNetUnfolderBase]: For 29255/29255 co-relation queries the response was YES. [2024-06-03 18:38:35,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6051 conditions, 1384 events. 808/1384 cut-off events. For 29255/29255 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7433 event pairs, 359 based on Foata normal form. 26/1408 useless extension candidates. Maximal degree in co-relation 5997. Up to 1122 conditions per place. [2024-06-03 18:38:35,687 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 15 changer transitions 12/98 dead transitions. [2024-06-03 18:38:35,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 98 transitions, 884 flow [2024-06-03 18:38:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 18:38:35,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-03 18:38:35,688 INFO L175 Difference]: Start difference. First operand has 122 places, 86 transitions, 652 flow. Second operand 8 states and 154 transitions. [2024-06-03 18:38:35,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 98 transitions, 884 flow [2024-06-03 18:38:35,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 807 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:35,707 INFO L231 Difference]: Finished difference. Result has 118 places, 82 transitions, 576 flow [2024-06-03 18:38:35,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2024-06-03 18:38:35,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-03 18:38:35,707 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 576 flow [2024-06-03 18:38:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:35,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:35,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 18:38:35,708 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:35,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1773725410, now seen corresponding path program 10 times [2024-06-03 18:38:35,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:35,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820172031] [2024-06-03 18:38:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:35,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:35,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820172031] [2024-06-03 18:38:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820172031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:35,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220987215] [2024-06-03 18:38:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:35,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:35,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:35,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:35,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:35,965 INFO L124 PetriNetUnfolderBase]: 679/1173 cut-off events. [2024-06-03 18:38:35,965 INFO L125 PetriNetUnfolderBase]: For 19489/19489 co-relation queries the response was YES. [2024-06-03 18:38:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4604 conditions, 1173 events. 679/1173 cut-off events. For 19489/19489 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6092 event pairs, 219 based on Foata normal form. 24/1195 useless extension candidates. Maximal degree in co-relation 4551. Up to 856 conditions per place. [2024-06-03 18:38:35,970 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 12 changer transitions 13/98 dead transitions. [2024-06-03 18:38:35,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 98 transitions, 832 flow [2024-06-03 18:38:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 18:38:35,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-03 18:38:35,971 INFO L175 Difference]: Start difference. First operand has 118 places, 82 transitions, 576 flow. Second operand 8 states and 156 transitions. [2024-06-03 18:38:35,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 98 transitions, 832 flow [2024-06-03 18:38:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 98 transitions, 798 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:35,986 INFO L231 Difference]: Finished difference. Result has 115 places, 76 transitions, 521 flow [2024-06-03 18:38:35,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=521, PETRI_PLACES=115, PETRI_TRANSITIONS=76} [2024-06-03 18:38:35,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-03 18:38:35,986 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 76 transitions, 521 flow [2024-06-03 18:38:35,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:35,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:35,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:35,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 18:38:35,987 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:35,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1712643742, now seen corresponding path program 11 times [2024-06-03 18:38:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:35,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708482532] [2024-06-03 18:38:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:36,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:36,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708482532] [2024-06-03 18:38:36,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708482532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:36,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:36,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:36,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901075161] [2024-06-03 18:38:36,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:36,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:36,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:36,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:36,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 76 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:36,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:36,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:36,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:36,203 INFO L124 PetriNetUnfolderBase]: 744/1300 cut-off events. [2024-06-03 18:38:36,203 INFO L125 PetriNetUnfolderBase]: For 22012/22012 co-relation queries the response was YES. [2024-06-03 18:38:36,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 1300 events. 744/1300 cut-off events. For 22012/22012 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6954 event pairs, 91 based on Foata normal form. 18/1314 useless extension candidates. Maximal degree in co-relation 5265. Up to 698 conditions per place. [2024-06-03 18:38:36,210 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 67 selfloop transitions, 16 changer transitions 13/102 dead transitions. [2024-06-03 18:38:36,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 102 transitions, 877 flow [2024-06-03 18:38:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 18:38:36,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-03 18:38:36,211 INFO L175 Difference]: Start difference. First operand has 115 places, 76 transitions, 521 flow. Second operand 8 states and 165 transitions. [2024-06-03 18:38:36,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 102 transitions, 877 flow [2024-06-03 18:38:36,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 832 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:36,231 INFO L231 Difference]: Finished difference. Result has 110 places, 74 transitions, 501 flow [2024-06-03 18:38:36,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=501, PETRI_PLACES=110, PETRI_TRANSITIONS=74} [2024-06-03 18:38:36,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-03 18:38:36,231 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 74 transitions, 501 flow [2024-06-03 18:38:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:36,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:36,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:36,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 18:38:36,232 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:36,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1685045522, now seen corresponding path program 12 times [2024-06-03 18:38:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059941740] [2024-06-03 18:38:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:36,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:36,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059941740] [2024-06-03 18:38:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059941740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:36,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131512061] [2024-06-03 18:38:36,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:36,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:36,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 74 transitions, 501 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:36,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:36,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:36,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:36,493 INFO L124 PetriNetUnfolderBase]: 700/1226 cut-off events. [2024-06-03 18:38:36,493 INFO L125 PetriNetUnfolderBase]: For 22001/22001 co-relation queries the response was YES. [2024-06-03 18:38:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5126 conditions, 1226 events. 700/1226 cut-off events. For 22001/22001 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6520 event pairs, 64 based on Foata normal form. 18/1242 useless extension candidates. Maximal degree in co-relation 5075. Up to 698 conditions per place. [2024-06-03 18:38:36,499 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 19 changer transitions 8/100 dead transitions. [2024-06-03 18:38:36,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 100 transitions, 850 flow [2024-06-03 18:38:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 18:38:36,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:38:36,500 INFO L175 Difference]: Start difference. First operand has 110 places, 74 transitions, 501 flow. Second operand 9 states and 180 transitions. [2024-06-03 18:38:36,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 100 transitions, 850 flow [2024-06-03 18:38:36,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 100 transitions, 814 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:36,515 INFO L231 Difference]: Finished difference. Result has 111 places, 73 transitions, 503 flow [2024-06-03 18:38:36,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=503, PETRI_PLACES=111, PETRI_TRANSITIONS=73} [2024-06-03 18:38:36,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-03 18:38:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 73 transitions, 503 flow [2024-06-03 18:38:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:36,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:36,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:36,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 18:38:36,525 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:36,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash 985181480, now seen corresponding path program 13 times [2024-06-03 18:38:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:36,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604786983] [2024-06-03 18:38:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:36,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:36,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604786983] [2024-06-03 18:38:36,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604786983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:36,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:36,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:36,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971020997] [2024-06-03 18:38:36,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:36,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:36,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:36,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:36,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 73 transitions, 503 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:36,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:36,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:36,816 INFO L124 PetriNetUnfolderBase]: 595/1039 cut-off events. [2024-06-03 18:38:36,816 INFO L125 PetriNetUnfolderBase]: For 16151/16151 co-relation queries the response was YES. [2024-06-03 18:38:36,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 1039 events. 595/1039 cut-off events. For 16151/16151 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5240 event pairs, 52 based on Foata normal form. 18/1055 useless extension candidates. Maximal degree in co-relation 4095. Up to 698 conditions per place. [2024-06-03 18:38:36,821 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 16 changer transitions 13/93 dead transitions. [2024-06-03 18:38:36,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 93 transitions, 757 flow [2024-06-03 18:38:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 18:38:36,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-03 18:38:36,822 INFO L175 Difference]: Start difference. First operand has 111 places, 73 transitions, 503 flow. Second operand 9 states and 175 transitions. [2024-06-03 18:38:36,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 93 transitions, 757 flow [2024-06-03 18:38:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 715 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:36,837 INFO L231 Difference]: Finished difference. Result has 111 places, 66 transitions, 444 flow [2024-06-03 18:38:36,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=444, PETRI_PLACES=111, PETRI_TRANSITIONS=66} [2024-06-03 18:38:36,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-03 18:38:36,837 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 66 transitions, 444 flow [2024-06-03 18:38:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:36,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:36,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:36,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 18:38:36,838 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:36,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:36,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1235992666, now seen corresponding path program 14 times [2024-06-03 18:38:36,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:36,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208940811] [2024-06-03 18:38:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:36,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208940811] [2024-06-03 18:38:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208940811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:36,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:36,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098506263] [2024-06-03 18:38:36,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:36,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:36,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 66 transitions, 444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:36,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:36,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:36,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:37,127 INFO L124 PetriNetUnfolderBase]: 659/1149 cut-off events. [2024-06-03 18:38:37,127 INFO L125 PetriNetUnfolderBase]: For 23989/23989 co-relation queries the response was YES. [2024-06-03 18:38:37,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 1149 events. 659/1149 cut-off events. For 23989/23989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6067 event pairs, 272 based on Foata normal form. 24/1172 useless extension candidates. Maximal degree in co-relation 4833. Up to 576 conditions per place. [2024-06-03 18:38:37,132 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 56 selfloop transitions, 12 changer transitions 16/90 dead transitions. [2024-06-03 18:38:37,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 90 transitions, 766 flow [2024-06-03 18:38:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 18:38:37,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-03 18:38:37,133 INFO L175 Difference]: Start difference. First operand has 111 places, 66 transitions, 444 flow. Second operand 10 states and 192 transitions. [2024-06-03 18:38:37,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 90 transitions, 766 flow [2024-06-03 18:38:37,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 90 transitions, 687 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-03 18:38:37,147 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 367 flow [2024-06-03 18:38:37,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=367, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2024-06-03 18:38:37,147 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-03 18:38:37,147 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 367 flow [2024-06-03 18:38:37,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:37,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:37,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:37,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 18:38:37,148 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:37,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:37,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2015711204, now seen corresponding path program 15 times [2024-06-03 18:38:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:37,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096479882] [2024-06-03 18:38:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:37,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:37,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096479882] [2024-06-03 18:38:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096479882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:37,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:37,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815400934] [2024-06-03 18:38:37,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:37,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:37,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:37,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:37,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:37,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:37,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:37,455 INFO L124 PetriNetUnfolderBase]: 599/1041 cut-off events. [2024-06-03 18:38:37,455 INFO L125 PetriNetUnfolderBase]: For 23633/23633 co-relation queries the response was YES. [2024-06-03 18:38:37,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4410 conditions, 1041 events. 599/1041 cut-off events. For 23633/23633 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5314 event pairs, 256 based on Foata normal form. 24/1064 useless extension candidates. Maximal degree in co-relation 4365. Up to 576 conditions per place. [2024-06-03 18:38:37,460 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 55 selfloop transitions, 11 changer transitions 10/82 dead transitions. [2024-06-03 18:38:37,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 649 flow [2024-06-03 18:38:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-03 18:38:37,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-03 18:38:37,461 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 367 flow. Second operand 10 states and 186 transitions. [2024-06-03 18:38:37,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 649 flow [2024-06-03 18:38:37,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 618 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:37,471 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 345 flow [2024-06-03 18:38:37,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2024-06-03 18:38:37,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-03 18:38:37,472 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 345 flow [2024-06-03 18:38:37,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:37,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:37,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:37,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 18:38:37,472 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:37,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash -601525390, now seen corresponding path program 16 times [2024-06-03 18:38:37,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:37,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493103494] [2024-06-03 18:38:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:37,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493103494] [2024-06-03 18:38:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493103494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:37,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:37,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:37,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315029272] [2024-06-03 18:38:37,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:37,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:37,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:37,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 59 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:37,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:37,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:37,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:37,785 INFO L124 PetriNetUnfolderBase]: 448/784 cut-off events. [2024-06-03 18:38:37,785 INFO L125 PetriNetUnfolderBase]: For 13285/13285 co-relation queries the response was YES. [2024-06-03 18:38:37,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 784 events. 448/784 cut-off events. For 13285/13285 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3699 event pairs, 211 based on Foata normal form. 26/809 useless extension candidates. Maximal degree in co-relation 2853. Up to 576 conditions per place. [2024-06-03 18:38:37,788 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 44 selfloop transitions, 5 changer transitions 16/71 dead transitions. [2024-06-03 18:38:37,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 71 transitions, 515 flow [2024-06-03 18:38:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 18:38:37,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 18:38:37,789 INFO L175 Difference]: Start difference. First operand has 97 places, 59 transitions, 345 flow. Second operand 9 states and 162 transitions. [2024-06-03 18:38:37,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 71 transitions, 515 flow [2024-06-03 18:38:37,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 71 transitions, 492 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:37,796 INFO L231 Difference]: Finished difference. Result has 95 places, 52 transitions, 282 flow [2024-06-03 18:38:37,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=95, PETRI_TRANSITIONS=52} [2024-06-03 18:38:37,797 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-03 18:38:37,797 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 52 transitions, 282 flow [2024-06-03 18:38:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:37,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:37,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:37,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 18:38:37,797 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:37,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1647263804, now seen corresponding path program 17 times [2024-06-03 18:38:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:37,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952463615] [2024-06-03 18:38:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:37,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:37,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952463615] [2024-06-03 18:38:37,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952463615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:37,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:37,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649204630] [2024-06-03 18:38:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:37,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:37,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:37,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:37,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 52 transitions, 282 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:37,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:37,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:37,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:38,016 INFO L124 PetriNetUnfolderBase]: 492/880 cut-off events. [2024-06-03 18:38:38,016 INFO L125 PetriNetUnfolderBase]: For 14502/14502 co-relation queries the response was YES. [2024-06-03 18:38:38,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 880 events. 492/880 cut-off events. For 14502/14502 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4364 event pairs, 161 based on Foata normal form. 18/897 useless extension candidates. Maximal degree in co-relation 3401. Up to 422 conditions per place. [2024-06-03 18:38:38,020 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 7 changer transitions 13/76 dead transitions. [2024-06-03 18:38:38,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 76 transitions, 562 flow [2024-06-03 18:38:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 18:38:38,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-03 18:38:38,020 INFO L175 Difference]: Start difference. First operand has 95 places, 52 transitions, 282 flow. Second operand 9 states and 173 transitions. [2024-06-03 18:38:38,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 76 transitions, 562 flow [2024-06-03 18:38:38,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 76 transitions, 515 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:38,030 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 256 flow [2024-06-03 18:38:38,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2024-06-03 18:38:38,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-03 18:38:38,031 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 256 flow [2024-06-03 18:38:38,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:38,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:38,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 18:38:38,032 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:38,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1713524148, now seen corresponding path program 18 times [2024-06-03 18:38:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:38,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497846286] [2024-06-03 18:38:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:38,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:38,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:38,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497846286] [2024-06-03 18:38:38,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497846286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:38,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:38,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892883983] [2024-06-03 18:38:38,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:38,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:38,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 256 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:38,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:38,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:38,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:38,303 INFO L124 PetriNetUnfolderBase]: 448/808 cut-off events. [2024-06-03 18:38:38,303 INFO L125 PetriNetUnfolderBase]: For 10606/10606 co-relation queries the response was YES. [2024-06-03 18:38:38,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 808 events. 448/808 cut-off events. For 10606/10606 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3941 event pairs, 153 based on Foata normal form. 18/825 useless extension candidates. Maximal degree in co-relation 2955. Up to 422 conditions per place. [2024-06-03 18:38:38,306 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 51 selfloop transitions, 8 changer transitions 12/77 dead transitions. [2024-06-03 18:38:38,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 77 transitions, 528 flow [2024-06-03 18:38:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-03 18:38:38,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-03 18:38:38,307 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 256 flow. Second operand 11 states and 202 transitions. [2024-06-03 18:38:38,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 77 transitions, 528 flow [2024-06-03 18:38:38,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 504 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:38,311 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 245 flow [2024-06-03 18:38:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=245, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2024-06-03 18:38:38,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-03 18:38:38,311 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 245 flow [2024-06-03 18:38:38,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:38,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:38,311 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] [2024-06-03 18:38:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 18:38:38,312 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:38,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1713529728, now seen corresponding path program 19 times [2024-06-03 18:38:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987369001] [2024-06-03 18:38:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:38,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987369001] [2024-06-03 18:38:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987369001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:38,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:38,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:38,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786064941] [2024-06-03 18:38:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:38,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:38,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:38,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:38,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 245 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:38,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:38,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:38,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:38,553 INFO L124 PetriNetUnfolderBase]: 343/621 cut-off events. [2024-06-03 18:38:38,553 INFO L125 PetriNetUnfolderBase]: For 5898/5898 co-relation queries the response was YES. [2024-06-03 18:38:38,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 621 events. 343/621 cut-off events. For 5898/5898 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2776 event pairs, 141 based on Foata normal form. 18/638 useless extension candidates. Maximal degree in co-relation 2075. Up to 422 conditions per place. [2024-06-03 18:38:38,555 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 35 selfloop transitions, 3 changer transitions 20/64 dead transitions. [2024-06-03 18:38:38,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 64 transitions, 413 flow [2024-06-03 18:38:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 18:38:38,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-03 18:38:38,556 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 245 flow. Second operand 9 states and 163 transitions. [2024-06-03 18:38:38,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 64 transitions, 413 flow [2024-06-03 18:38:38,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 64 transitions, 394 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:38,559 INFO L231 Difference]: Finished difference. Result has 81 places, 42 transitions, 205 flow [2024-06-03 18:38:38,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=81, PETRI_TRANSITIONS=42} [2024-06-03 18:38:38,559 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-03 18:38:38,560 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 42 transitions, 205 flow [2024-06-03 18:38:38,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:38,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:38,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:38,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 18:38:38,560 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:38,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1356038226, now seen corresponding path program 20 times [2024-06-03 18:38:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:38,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901982774] [2024-06-03 18:38:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:38,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:38,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901982774] [2024-06-03 18:38:38,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901982774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:38,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:38,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815458160] [2024-06-03 18:38:38,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:38,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:38,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 42 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:38,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:38,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:38,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:38,798 INFO L124 PetriNetUnfolderBase]: 393/710 cut-off events. [2024-06-03 18:38:38,799 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-03 18:38:38,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 710 events. 393/710 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3372 event pairs, 71 based on Foata normal form. 18/726 useless extension candidates. Maximal degree in co-relation 2540. Up to 204 conditions per place. [2024-06-03 18:38:38,801 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 41 selfloop transitions, 12 changer transitions 13/72 dead transitions. [2024-06-03 18:38:38,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 471 flow [2024-06-03 18:38:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 18:38:38,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-03 18:38:38,802 INFO L175 Difference]: Start difference. First operand has 81 places, 42 transitions, 205 flow. Second operand 10 states and 192 transitions. [2024-06-03 18:38:38,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 471 flow [2024-06-03 18:38:38,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 447 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:38,805 INFO L231 Difference]: Finished difference. Result has 72 places, 39 transitions, 198 flow [2024-06-03 18:38:38,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=39} [2024-06-03 18:38:38,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-03 18:38:38,806 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 39 transitions, 198 flow [2024-06-03 18:38:38,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:38,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:38,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 18:38:38,806 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:38,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2121279086, now seen corresponding path program 21 times [2024-06-03 18:38:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:38,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557974677] [2024-06-03 18:38:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:38,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:38,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:38,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557974677] [2024-06-03 18:38:38,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557974677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:38,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:38,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:38,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967913530] [2024-06-03 18:38:38,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:38,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:38,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:38,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 39 transitions, 198 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:38,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:38,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:38,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:39,106 INFO L124 PetriNetUnfolderBase]: 450/818 cut-off events. [2024-06-03 18:38:39,106 INFO L125 PetriNetUnfolderBase]: For 7104/7104 co-relation queries the response was YES. [2024-06-03 18:38:39,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 818 events. 450/818 cut-off events. For 7104/7104 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4161 event pairs, 118 based on Foata normal form. 18/835 useless extension candidates. Maximal degree in co-relation 3009. Up to 387 conditions per place. [2024-06-03 18:38:39,109 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 12 changer transitions 8/69 dead transitions. [2024-06-03 18:38:39,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 451 flow [2024-06-03 18:38:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-03 18:38:39,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-03 18:38:39,110 INFO L175 Difference]: Start difference. First operand has 72 places, 39 transitions, 198 flow. Second operand 11 states and 206 transitions. [2024-06-03 18:38:39,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 451 flow [2024-06-03 18:38:39,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 409 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:39,113 INFO L231 Difference]: Finished difference. Result has 70 places, 38 transitions, 191 flow [2024-06-03 18:38:39,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=38} [2024-06-03 18:38:39,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-03 18:38:39,113 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 38 transitions, 191 flow [2024-06-03 18:38:39,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:39,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 18:38:39,114 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:39,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1999593288, now seen corresponding path program 22 times [2024-06-03 18:38:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:39,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105875688] [2024-06-03 18:38:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:39,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105875688] [2024-06-03 18:38:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105875688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:39,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276719976] [2024-06-03 18:38:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:39,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 38 transitions, 191 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:39,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:39,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:39,385 INFO L124 PetriNetUnfolderBase]: 345/631 cut-off events. [2024-06-03 18:38:39,385 INFO L125 PetriNetUnfolderBase]: For 3964/3964 co-relation queries the response was YES. [2024-06-03 18:38:39,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2194 conditions, 631 events. 345/631 cut-off events. For 3964/3964 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2969 event pairs, 106 based on Foata normal form. 18/648 useless extension candidates. Maximal degree in co-relation 2165. Up to 387 conditions per place. [2024-06-03 18:38:39,387 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 30 selfloop transitions, 8 changer transitions 16/60 dead transitions. [2024-06-03 18:38:39,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 60 transitions, 365 flow [2024-06-03 18:38:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-03 18:38:39,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 18:38:39,388 INFO L175 Difference]: Start difference. First operand has 70 places, 38 transitions, 191 flow. Second operand 10 states and 184 transitions. [2024-06-03 18:38:39,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 60 transitions, 365 flow [2024-06-03 18:38:39,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 337 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:39,390 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 161 flow [2024-06-03 18:38:39,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-03 18:38:39,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-03 18:38:39,391 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 161 flow [2024-06-03 18:38:39,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:39,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:39,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 18:38:39,391 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:39,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1800297078, now seen corresponding path program 23 times [2024-06-03 18:38:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:39,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822913487] [2024-06-03 18:38:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:39,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:39,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822913487] [2024-06-03 18:38:39,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822913487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:39,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:39,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612666515] [2024-06-03 18:38:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:39,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:39,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:39,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 161 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:39,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:39,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:39,681 INFO L124 PetriNetUnfolderBase]: 313/579 cut-off events. [2024-06-03 18:38:39,681 INFO L125 PetriNetUnfolderBase]: For 3830/3830 co-relation queries the response was YES. [2024-06-03 18:38:39,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 579 events. 313/579 cut-off events. For 3830/3830 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2730 event pairs, 68 based on Foata normal form. 18/596 useless extension candidates. Maximal degree in co-relation 1965. Up to 204 conditions per place. [2024-06-03 18:38:39,683 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 37 selfloop transitions, 8 changer transitions 12/63 dead transitions. [2024-06-03 18:38:39,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 385 flow [2024-06-03 18:38:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-03 18:38:39,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-03 18:38:39,684 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 161 flow. Second operand 11 states and 201 transitions. [2024-06-03 18:38:39,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 385 flow [2024-06-03 18:38:39,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 361 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:39,686 INFO L231 Difference]: Finished difference. Result has 65 places, 32 transitions, 148 flow [2024-06-03 18:38:39,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=32} [2024-06-03 18:38:39,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-03 18:38:39,686 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 32 transitions, 148 flow [2024-06-03 18:38:39,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:39,687 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, 1] [2024-06-03 18:38:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 18:38:39,687 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:39,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1020795598, now seen corresponding path program 24 times [2024-06-03 18:38:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:39,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880061953] [2024-06-03 18:38:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:39,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880061953] [2024-06-03 18:38:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880061953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:39,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:39,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721215014] [2024-06-03 18:38:39,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:39,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:39,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 32 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:39,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:39,927 INFO L124 PetriNetUnfolderBase]: 208/396 cut-off events. [2024-06-03 18:38:39,927 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2024-06-03 18:38:39,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 396 events. 208/396 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1614 event pairs, 12 based on Foata normal form. 18/413 useless extension candidates. Maximal degree in co-relation 1253. Up to 147 conditions per place. [2024-06-03 18:38:39,928 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 27 selfloop transitions, 6 changer transitions 13/52 dead transitions. [2024-06-03 18:38:39,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 52 transitions, 302 flow [2024-06-03 18:38:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 18:38:39,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-03 18:38:39,929 INFO L175 Difference]: Start difference. First operand has 65 places, 32 transitions, 148 flow. Second operand 10 states and 176 transitions. [2024-06-03 18:38:39,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 52 transitions, 302 flow [2024-06-03 18:38:39,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 277 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:39,931 INFO L231 Difference]: Finished difference. Result has 62 places, 29 transitions, 124 flow [2024-06-03 18:38:39,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=124, PETRI_PLACES=62, PETRI_TRANSITIONS=29} [2024-06-03 18:38:39,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-03 18:38:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 29 transitions, 124 flow [2024-06-03 18:38:39,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:39,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:39,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 18:38:39,932 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:39,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1562697246, now seen corresponding path program 25 times [2024-06-03 18:38:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:39,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430807194] [2024-06-03 18:38:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:40,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:40,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430807194] [2024-06-03 18:38:40,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430807194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:40,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:40,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:40,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276132626] [2024-06-03 18:38:40,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:40,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 18:38:40,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 29 transitions, 124 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:40,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:40,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 18:38:40,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:40,178 INFO L124 PetriNetUnfolderBase]: 83/177 cut-off events. [2024-06-03 18:38:40,178 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-06-03 18:38:40,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 177 events. 83/177 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 513 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 494. Up to 96 conditions per place. [2024-06-03 18:38:40,179 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-03 18:38:40,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 40 transitions, 202 flow [2024-06-03 18:38:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 18:38:40,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-03 18:38:40,180 INFO L175 Difference]: Start difference. First operand has 62 places, 29 transitions, 124 flow. Second operand 9 states and 152 transitions. [2024-06-03 18:38:40,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 40 transitions, 202 flow [2024-06-03 18:38:40,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 40 transitions, 177 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:40,181 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2024-06-03 18:38:40,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2024-06-03 18:38:40,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-03 18:38:40,181 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2024-06-03 18:38:40,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-03 18:38:40,183 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-03 18:38:40,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-03 18:38:40,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-03 18:38:40,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-03 18:38:40,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-03 18:38:40,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-03 18:38:40,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 18:38:40,185 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:40,187 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 18:38:40,187 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 18:38:40,190 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-03 18:38:40,190 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-03 18:38:40,191 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 06:38:40 BasicIcfg [2024-06-03 18:38:40,191 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 18:38:40,191 INFO L158 Benchmark]: Toolchain (without parser) took 85027.97ms. Allocated memory was 142.6MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 102.1MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 407.2MB. Max. memory is 16.1GB. [2024-06-03 18:38:40,191 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 111.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:38:40,191 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 105.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:38:40,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 487.35ms. Allocated memory is still 142.6MB. Free memory was 101.5MB in the beginning and 74.8MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-03 18:38:40,192 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.61ms. Allocated memory is still 142.6MB. Free memory was 74.8MB in the beginning and 72.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:38:40,192 INFO L158 Benchmark]: Boogie Preprocessor took 55.81ms. Allocated memory is still 142.6MB. Free memory was 72.1MB in the beginning and 112.7MB in the end (delta: -40.5MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2024-06-03 18:38:40,192 INFO L158 Benchmark]: RCFGBuilder took 428.56ms. Allocated memory is still 142.6MB. Free memory was 112.7MB in the beginning and 86.5MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-03 18:38:40,192 INFO L158 Benchmark]: TraceAbstraction took 84008.56ms. Allocated memory was 142.6MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 85.4MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 391.4MB. Max. memory is 16.1GB. [2024-06-03 18:38:40,193 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 111.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 105.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 487.35ms. Allocated memory is still 142.6MB. Free memory was 101.5MB in the beginning and 74.8MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.61ms. Allocated memory is still 142.6MB. Free memory was 74.8MB in the beginning and 72.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.81ms. Allocated memory is still 142.6MB. Free memory was 72.1MB in the beginning and 112.7MB in the end (delta: -40.5MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * RCFGBuilder took 428.56ms. Allocated memory is still 142.6MB. Free memory was 112.7MB in the beginning and 86.5MB in the end (delta: 26.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 84008.56ms. Allocated memory was 142.6MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 85.4MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 391.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 83.9s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 70.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9573 SdHoareTripleChecker+Valid, 14.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7908 mSDsluCounter, 2749 SdHoareTripleChecker+Invalid, 12.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1879 mSDsCounter, 1389 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34206 IncrementalHoareTripleChecker+Invalid, 35595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1389 mSolverCounterUnsat, 870 mSDtfsCounter, 34206 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 999 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2194occurred in iteration=62, InterpolantAutomatonStates: 1055, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 2571 NumberOfCodeBlocks, 2571 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2438 ConstructedInterpolants, 0 QuantifiedInterpolants, 22772 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 18:38:40,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE